# US 9,521,704 B2 · Housing for a mobile telephone > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,521,704 B2 - Document ID: US9521704B2 - Status: Granted - Kind: B2 - Application number: 14/994,055 - Filed: 2016-01-12 - Published: 2016-07-14 - Granted: 2016-12-13 - Earliest claimed: 2015-01-12 - Assignees: P3 Communications GmbH - Applicants: P3 Communications GmbH - Inventors: Jan Matti Reiffenrath; Peter Seidenberg - Web page: https://patentgrep.com/patent/US9521704B2 ## CPC - H04W 88/06: adapted for operation in multiple networks {or having at least two operational modes}, e.g. multi-mode terminals - G01R 29/105: {using anechoic chambers; Chambers or open field sites used therefor (test sites used for measuring on other objects than aerials G01R29/0828; wave absorbing devices H01Q17/00)} - H01Q 1/526: {Electromagnetic shields} - H04M 1/026: {Details of the structure or mounting of specific components} - H04M 1/0293: {Terminal boxes for telephone sets} - H04M 1/11: Supports for sets, e.g. incorporating armrests - H04W 24/08: Testing, {supervising or monitoring} using real traffic - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12) - H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72) - H04M: TELEPHONIC COMMUNICATION (circuits for controlling other apparatus via a telephone cable and not involving telephone switching apparatus G08) ## Abstract Aspects of the innovations herein relates to a housing having a housing wall comprising a polymer including electrically conductive particles, wherein an inner chamber is provided in the housing, and is formed and enclosed by the housing wall and into which a mobile telephone may be inserted. In some implementations, the housing wall may be designed to attenuate a mobile radio signal of the mobile telephone, such as by ≧3 dB, as compared to unobstructed propagation, on the side of the housing wall facing away from the inner chamber. ## Claims ### Claim 1 A housing comprising: a housing wall comprising a polymer including electrically conductive particles, wherein an inner chamber is provided in the housing, and is formed and enclosed by the housing wall, the inner chamber being shaped to receive a mobile telephone, and wherein the housing wall is designed to attenuate a mobile radio signal of the mobile telephone by ≧3 dB and ≦15 dB, as compared to unobstructed propagation, on the side of the housing wall facing away from the inner chamber. ### Claim 2 (depends on 1) The housing of claim 1, wherein the housing wall is designed to attenuate the mobile radio signal, including electromagnetic radiation which is generated and/or received by the mobile telephone by ≧7 dB and ≦13 dB. ### Claim 3 (depends on 1) The housing of claim 1, wherein the housing wall comprises a housing base and four housing side walls and is arranged in such a way that the inner chamber is designed having a cuboid shape. ### Claim 4 (depends on 1) The housing of claim 1, wherein the housing wall comprises a housing cover for covering the inner chamber and the housing cover is pivotably held on the housing side wall. ### Claim 5 (depends on 4) The housing of claim 4, further comprising a cover spacing element which forms an air gap at least between a housing side wall and the housing cover in an arrangement of the housing where the inner chamber is covered with the housing cover. ### Claim 6 (depends on 5) The housing of claim 5, further comprising a plurality of telephone spacing elements formed, with the mobile telephone, in such a way that an air gap is formed between all the housing side walls, the housing base and, in an arrangement where the inner chamber is covered with the housing cover, the housing cover, and wherein the mobile telephone is fixed in the inner chamber. ### Claim 7 (depends on 6) The housing of claim 6, wherein the housing wall is designed to attenuate the mobile radio signal, including electromagnetic radiation which is generated and/or received by the mobile telephone by ≧7 dB and ≦13 dB. ### Claim 8 (depends on 7) The housing of claim 7, wherein the housing wall comprises a housing base and four housing side walls and is arranged in such a way that the inner chamber has a cuboid shape. ### Claim 9 (depends on 8) The housing of claim 8, wherein the housing wall comprises a layer which includes carbon particles and has a specific resistance of ≧10−3 ohm cm to ≦108 ohm cm. ### Claim 10 (depends on 9) The housing of claim 9, wherein the housing wall comprises a polyurethane foam which has a relative wave impedance of ≧0.13 and ≦0.83, measured at a frequency of 3 GHz. ### Claim 11 (depends on 1) The housing of claim 1, further comprising a housing intermediate element made from the polymer including electrically conductive particles, wherein the housing intermediate element forms another inner chamber in the housing, the another inner chamber having peripheral elements that are sized and arranged to create an orfice into which another mobile telephone is housed when inserted. ### Claim 12 (depends on 11) The housing of claim 11, further comprising a plurality of telephone spacing elements formed, with the mobile telephone, in such a way that an air gap is formed between all the housing side walls, the housing base and, in an arrangement where the inner chamber is covered with the housing cover, the housing cover, and wherein the mobile telephone is fixed in the inner chamber. ### Claim 13 (depends on 11) The housing of claim 11, further comprising a cover spacing element which forms an air gap between a housing side wall and the housing cover in an arrangement of the housing where the housing cover is positioned directly over the inner chamber to cover the inner chamber. ### Claim 14 (depends on 1) The housing of claim 1, further comprising a telephone spacing element which is disposed on the housing wall forms an air gap between an edge of the mobile telephone and the housing wall. ### Claim 15 (depends on 14) The housing of claim 14, further comprising a cover spacing element which forms an air gap between a housing side wall and the housing cover in an arrangement of the housing where the housing cover is positioned directly over the inner chamber to cover the inner chamber. ### Claim 16 (depends on 14) The housing of claim 14, further comprising a plurality of telephone spacing elements formed, with the mobile telephone, in such a way that an air gap is formed between all the housing side walls, the housing base and, in an arrangement where the inner chamber is covered with the housing cover, the housing cover, and wherein the mobile telephone is fixed in the inner chamber. ### Claim 17 (depends on 1) The housing of claim 1, wherein the housing wall is impregnated with a soot dispersion, the housing wall comprises a layer which includes carbon particles and has a specific resistance of ≧10−3 ohm cm to ≦108 ohm cm and/or the housing wall is made from a polyurethane foam which has a relative wave impedance of ≧0.13 and ≦0.83, measured at a frequency of 3 GHz. ### Claim 18 (depends on 17) The housing of claim 17, further comprising a plurality of telephone spacing elements formed, with the mobile telephone, in such a way that an air gap is formed between all the housing side walls, the housing base and, in an arrangement where the inner chamber is covered with the housing cover, the housing cover, and wherein the mobile telephone is fixed in the inner chamber. ### Claim 19 (depends on 1) A method for attenuating a mobile radio signal of a mobile telephone, comprising the steps: providing a housing described in claim 1; inserting the mobile telephone into the inner chamber; and covering the inner chamber with the housing cover. ### Claim 20 A method for manufacturing a housing for a mobile telephone, comprising the steps: providing a layer of a polymer, which includes electrically conductive particles, as a housing base; connecting another layer of the planar polymer, which includes electrically conductive particles, as housing side walls to the housing base in such a way that an inner chamber having a preferably cuboid shape is formed, into which the mobile telephone can be inserted; and covering the inner chamber with another layer of the planar polymer, which includes electrically conductive particles, as the housing cover, wherein the housing base, the housing side walls, and the housing cover made from the polymer, which includes electrically conductive particles, are designed in such a way that a mobile radio signal of the mobile telephone is attenuated by ≧3 dB and ≦15 dB, as compared to unobstructed propagation, on the side of the housing wall facing away from the inner chamber.