# US 9,750,882 B2 · Supplemental device for attachment to an injection device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,750,882 B2 - Document ID: US9750882B2 - Status: Granted - Kind: B2 - Application number: 14/786,027 - Filed: 2014-04-16 - Published: 2016-03-10 - Granted: 2017-09-05 - Earliest claimed: 2013-04-22 - Assignees: Sanofi-Aventis Deutschland GmbH - Applicants: Sanofi-Aventis Deutschland GmbH - Inventors: Gertrud Blei; Mario Bock - Web page: https://patentgrep.com/patent/US9750882B2 ## CPC - A61M 5/31: Details - A61M 5/009: {Electronic or electro-mechanical add-on modules} - A61M 5/24: Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or cartridges, e.g. automatic - A61M 2005/3117: {Means preventing contamination of the medicament compartment of a syringe} - A61M 2005/3125: {Display means, e.g. to indicate dose setting} - A61M 2005/3126: {related to dosing} - A61M 2205/18: with alarm - A61M 2205/3306: Optical measuring means - A61M 2205/50: with microprocessors or computers - A61M 2205/502: User interfaces, e.g. screens or keyboards - A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)} ## Abstract A supplemental device for attachment to an injection device including a dosage window covering a sleeve on which dose values are marked is disclosed. The supplemental device comprises a main body; an arrangement for supporting the main body of the supplemental device in a predetermined positional relationship with the injection device; a transparent protection window located at a surface of the main body that is aligned with the dosage window of the injection pen when in use; a sensor arrangement supported in the main body and having a sensor directed at the protection window; an illumination arrangement comprising one or more sources of light, each of the one or more sources of light being directed at the protection window; and a dispersing part, which may be diffusing or scattering, located on an optical path between a first one of the one or more sources of light. ## Claims ### Claim 1 A supplemental device configured for attachment to an injection device including a dosage window covering a sleeve on which dose values are marked, the supplemental device comprising: a main body; an arrangement for supporting the main body of the supplemental device in a predetermined positional relationship with the injection device; a transparent protection window located at a surface of the main body that is configured to be aligned with a dosage window of the injection device when in use; a sensor arrangement supported in the main body and having a sensor directed at the protection window; an illumination arrangement comprising one or more sources of light, each of the one or more sources of light being directed at the protection window; and a light dispersing part located on a surface of the protection window and on an optical path between a first one of the one or more sources of light and a point on the dosage window at which reflection to the sensor would occur. ### Claim 2 (depends on 1) A supplemental device as claimed in claim 1, wherein the protection window has an optical power. ### Claim 3 (depends on 1) A supplemental device as claimed in claim 1, wherein the protection window is sealed to the main body so as to prevent the ingress of material into the supplemental device around the protection window. ### Claim 4 (depends on 1) A supplemental device as claimed in claim 1, wherein the light dispersing part is provided on a surface of the protection window that is closest to the sensor arrangement. ### Claim 5 (depends on 1) A supplemental device as claimed in claim 1, wherein the light dispersing part comprises plural prisms. ### Claim 6 (depends on 1) A supplemental device as claimed in claim 1, wherein the light dispersing part comprises a scattering or diffusing part. ### Claim 7 (depends on 1) A supplemental device as claimed in claim 1, wherein the light dispersing part comprises a roughened surface of the protection window. ### Claim 8 (depends on 1) A supplemental device as claimed in claim 1, wherein the light dispersing part is integral with the protection window. ### Claim 9 (depends on 1) A supplemental device as claimed in claim 1, wherein the light dispersing part is attached to the surface of the protection window. ### Claim 10 (depends on 1) A supplemental device as claimed in claim 1, wherein the light dispersing part is located on an optical path between a first one of the one or more sources of light and a point on a surface of the dosage window that is furthest from the sensor arrangement, the point being a point at which reflection to the sensor arrangement would occur. ### Claim 11 (depends on 1) A supplemental device as claimed in claim 1, wherein the light dispersing part is located on an optical path between a first one of the one or more sources of light and a point on a surface of the dosage window that is closest to the sensor arrangement, the point being a point at which reflection to the sensor would occur. ### Claim 12 (depends on 1) A supplemental device as claimed in claim 1, wherein the illumination arrangement comprises plural sources of light. ### Claim 13 (depends on 12) A supplemental device as claimed in claim 12, wherein the plural sources of light are located at different positions around the sensor arrangement. ### Claim 14 (depends on 1) A system comprising a supplemental device as claimed in claim 1 and an injection device. ### Claim 15 (depends on 14) A system as claimed in claim 14, wherein a surface of the protection window that is furthest from the sensor arrangement lies on a curved surface of an imaginary cylinder having an axis coincident with a longitudinal axis of the injection device and wherein the surface of the protection window that is furthest from the sensor arrangement lies in close proximity with a dosage window of the injection device when the supplemental device is installed on the injection device.