# US 12,293,844 B2 · Wearable-based certification of a premises as contagion-safe > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,293,844 B2 - Document ID: US12293844B2 - Status: Granted - Kind: B2 - Application number: 17/319,817 - Filed: 2021-05-13 - Published: 2021-09-09 - Granted: 2025-05-06 - Earliest claimed: 2015-06-14 - Assignees: Facense Ltd. - Applicants: Facense Ltd. - Inventors: Ari M Frank; Arie Tzvieli; Ori Tzvieli; Gil Thieberger - Web page: https://patentgrep.com/patent/US12293844B2 ## CPC - A61B 5/0077: {Devices for viewing the surface of the body, e.g. camera, magnifying lens} - G16H 50/80: for detecting, monitoring or modelling epidemics or pandemics, e.g. flu - A61B 5/02055: {Simultaneously evaluating both cardiovascular condition and temperature} - A61B 5/02416: {using photoplethysmograph signals, e.g. generated by infrared radiation (A61B5/14552 takes precedence)} - A61B 5/02438: {with portable devices, e.g. worn by the patient} - A61B 5/14532: {for measuring glucose, e.g. by tissue impedance measurement} - A61B 5/14552: {Details of sensors specially adapted therefor} - A61B 5/1477: non-invasive - A61B 5/165: {Evaluating the state of mind, e.g. depression, anxiety} - A61B 5/6803: {Head-worn items, e.g. helmets, masks, headphones or goggles} - A61B 5/6814: {Head} - A61B 5/7282: {Event detection, e.g. detecting unique waveforms indicative of a medical condition (cough events A61B5/0823; seizures A61B5/4094; sleep apnoea A61B5/4818)} - G01J 5/0025: {Living bodies (ear thermometers G01J5/0011; detecting, measuring or recording for diagnostic purposes A61B5/00)} - G01J 5/0265: {Handheld, portable (ear thermometers G01J5/049)} - G01J 5/064: {Ambient temperature sensor; Housing temperature sensor; Constructional details thereof} - G01J 5/485: {Temperature profile} - G06F 1/163: {Wearable computers, e.g. on a belt} - G06F 1/1684: {Constructional details or arrangements related to integrated I/O peripherals not covered by groups G06F1/1635 - G06F1/1675} - G16H 50/20: for computer-aided diagnosis, e.g. based on medical expert systems - G16H 50/30: for calculating health indices; for individual health risk assessment - A61B 5/015: {By temperature mapping of body part} - A61B 2562/0271: Thermal or temperature sensors - A61B 2562/0276: comprising a thermosensitive compound - A61B 2576/00: Medical imaging apparatus involving image processing or analysis (A61B1/00009, A61B6/52 and A61B8/52 take precedence) - G01J 5/00: Radiation pyrometry, e.g. infrared or optical thermometry - G01J 2005/0077: {Imaging} - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) - G16H: HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING OR PROCESSING OF MEDICAL OR HEALTHCARE DATA - G01J: MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY (light sources F21, H01J, H01K, H05B; investigating properties of materials by optical means G01N) - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract Due to the many interactions that can occur in places of gatherings, such as workplaces, schools, theaters, etc., these locations can be considered dangerous to enter during times of epidemics. It is difficult to keep track of the health state of all the people who visited a location, and thus ascertain if visits to the location pose any risk of contracting a disease. Some embodiments disclosed herein utilize wearable devices that measure physiological signals of their wearer in order to determine whether people who were at a location were healthy, and thus be able to certify the location as contagion-safe. ## Claims ### Claim 1 A system configured to certify a premises as contagion-safe, comprising: wearable devices configured to take measurements of users wearing the wearable devices utilizing first sensors configured to measure first signals indicative of photoplethysmogram signals and second sensors configured to measure second signals indicative of temperatures; and a computer configured to: calculate health scores of the users based on at least some of the first and second signals taken while the users were not on the premises; identify which of the users are non-symptomatic users based on their health scores reaching a threshold; authenticate identities of the non-symptomatic users; and certify the premises as contagion-safe responsive to determining that, from among the users, only non-symptomatic users, whose authentication was successful, entered the premises during a predetermined period. ### Claim 2 (depends on 1) The system of claim 1, further comprising a user interface configured to notify a non-symptomatic user that said non-symptomatic user is allowed on the premises. ### Claim 3 (depends on 1) The system of claim 1, wherein the computer is further configured to identify some of the users as symptomatic users based on their measurements taken while not on the premises; and further comprising a user interface configured to notify the symptomatic users, prior to their arriving to the premises, that they are not allowed on the premises. ### Claim 4 (depends on 1) The system of claim 1, wherein each at least some of the first sensors are contact photoplethysmogram sensors, at least some of the second sensors are contact temperature sensors, and the authentication of identities of at least some of the non-symptomatic users is based at least in part on their photoplethysmogram signals. ### Claim 5 (depends on 1) The system of claim 1, wherein the wearable devices further comprise acoustic sensors configured to take audio recordings of the users; and the computer is further configured to utilize, in calculation of a health score of a certain user from among the users, an extent of coughing recognizable in the audio recordings of the certain user. ### Claim 6 (depends on 1) The system of claim 1, wherein the computer is further configured to receive identities of at least some of the users who arrived at the premises and to determine, based on the identities, whether a user, who is not among the non-symptomatic users, entered the premises. ### Claim 7 (depends on 1) The system of claim 1, wherein the computer is further configured to: identify some of the users as symptomatic users based on their health scores reaching the threshold, and decertify the premises as contagion-safe responsive to detecting that a symptomatic user entered the premises after the predetermined period. ### Claim 8 (depends on 7) The system of claim 7, wherein the computer is further configured to receive an indication of a time when the symptomatic user left the premises, and to re-certify the premises as contagion-safe after a predetermined duration from that time. ### Claim 9 (depends on 1) The system of claim 1, wherein the computer is further configured to identify that a person not wearing one of the wearable devices (a non-cleared person) entered the premises after the predetermined period, and decertify the premises as contagion-safe responsive to detecting that the non-cleared person entered the premises. ### Claim 10 (depends on 1) The system of claim 1, wherein the computer is further configured to identify, after the predetermined period, that a user on the premises became ill, and decertify the premises as contagion-safe. ### Claim 11 (depends on 1) The system of claim 1, wherein the health scores are calculated with respect to a certain disease, and certification of the premises as contagion-safe is indicative that only non-symptomatic users with respect to the certain disease, whose authentication was successful, entered the premises during the predetermined period. ### Claim 12 (depends on 11) The system of claim 11, wherein the computer is further configured to confirm, based on external medical records, immunity of one or more people who had the certain disease and to refrain from decertifying the premises due to their entry to the premises during the predetermined period. ### Claim 13 A system configured to certify a premises as contagion-safe, comprising: wearable devices configured to take measurements of users wearing the wearable devices utilizing first sensors configured to measure first signals indicative of photoplethysmogram signals and second sensors configured to measure second signals indicative of temperatures; and a computer configured to: calculate health scores of the users based on at least some of the first and second signals taken while the users were not on the premises; identify which of the users are non-symptomatic users based on their health scores reaching a threshold; authenticate identities of the non-symptomatic users; and certify the premises as contagion-safe responsive to determining that the non-symptomatic users whose authentication was successful comprise at least a certain predetermined proportion of all of the users who visited the premises. ### Claim 14 (depends on 13) The system of claim 13, further comprising a user interface configured to present an indication proportional to at least one of percent and/or density of the following: the non-symptomatic users in the premises, symptomatic users in the premises, and users for which symptom status is unknown; whereby the presented indications support decision of other users whether to visit the premises at that time; and wherein the authentication of identities of at least some of the non-symptomatic users is based at least in part on their photoplethysmogram signals. ### Claim 15 (depends on 14) The system of claim 14, wherein the computer is further configured to receive location of a certain user in the premises, and recommend the certain user use certain personal protection equipment based on the indication proportional to the at least one of the percent and/or the density. ### Claim 16 A method for certifying a premises as contagion-safe, comprising: receiving measurements of users measured with wearable devices while the users were not on the premises; wherein the measurements are taken utilizing first sensors configured to measure first signals indicative of photoplethysmogram signals and second sensors configured to measure second signals indicative of temperatures; calculating health scores of the users based on the measurements; identifying which of the users are non-symptomatic users based on their health scores reaching a threshold; authenticating identities of the non-symptomatic users; and certifying the premises as contagion-safe responsive to determining that, from among the users, only non-symptomatic users, whose authentication was successful, entered the premises during a predetermined period. ### Claim 17 (depends on 16) The method of claim 16, further comprising notifying the non-symptomatic users that they are allowed on the premises; and further comprising: confirming, based on external medical records, immunity of one or more people who had a certain disease, and refraining from decertifying the premises due to their entry to the premises during the predetermined period. ### Claim 18 (depends on 16) The method of claim 16, further comprising: identifying some of the users as symptomatic users based on their measurements measured while not on the premises, and notifying the symptomatic users, prior to their arriving to the premises, that they are not allowed on the premises; and wherein authentication of identities of at least some of the symptomatic users is based at least in part on their photoplethysmogram signals. ### Claim 19 (depends on 16) The method of claim 16, further comprising: identifying some of the users as symptomatic users based on their health scores being below the threshold, and decertifying the premises as contagion-safe responsive to detecting that a symptomatic user entered the premises after the predetermined period. ### Claim 20 (depends on 16) The method of claim 16, further comprising: identifying, after the predetermined period, that a user on the premises became ill, and decertifying the premises as contagion-safe.