# US 5,351,284 A · Antenna for a base unit of a cordless telephone system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,351,284 A - Document ID: US5351284A - Status: Granted - Kind: A - Application number: 07/823,177 - Filed: 1992-01-21 - Granted: 1994-09-27 - Earliest claimed: 1992-01-21 - Assignees: Dynascan Corporation - Inventors: Max W. Rogers - Web page: https://patentgrep.com/patent/US5351284A ## CPC - H01Q 1/46: Electric supply lines or communication lines - H01Q 1/243: {with built-in antennas} - H04B 1/3833: {Hand-held transceivers} - H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72) - H04B: TRANSMISSION ## Abstract A base unit antenna for a cordless telephone system where the cordless telephone system comprises a base unit coupled via wires contained in a telephone cord to a telephone distribution system and a handset coupled to the base unit by a duplex radio communication link. The base unit includes a base unit antenna for transmitting and receiving the duplex radio communication with the handset. The antenna is preferably integrally contained in the telephone cord, but spaced from the telephone wires therein distribution system. ## Claims ### Claim 1 In a telephone system comprising a base unit and a portable handset coupled to the base unit by a duplex radio communication link and which is devoid of any antenna which extends or can be extended to project substantially from the handset, said base unit having a power cord having power conductors insertable into a commercial power line receptacle and a telephone cord including telephone wires to be connected to a telephone distribution system, and an antenna for the base unit for transmitting and receiving the duplex radio communication, the antenna being a wire integrally part of one of said power cord or telephone cord, but separate and distinct from said power conductor and said telephone wires by being spaced therefrom. ### Claim 2 In a telephone system comprising a base unit and a portable handset coupled to the base unit by a duplex radio communication link and which is devoid of any antenna which extends or can be extended to project substantially from the handset, said base unit being coupled via telephone wires contained in a telephone cord to a telephone distribution system, an antenna for the base unit for transmitting and receiving the duplex radio communication, the antenna being an integral part of the telephone cord, but separate and distinct from said telephone wires by being spaced therefrom. ### Claim 3 (depends on 2) The cordless telephone system of claim 2 wherein: the telephone cord is a 4-wire type cord; the base unit is coupled to the telephone distribution system by two of the four wires; and the antenna comprises one of the other two of the four wires. ### Claim 4 (depends on 2) The antenna of claim 2 wherein: the telephone cord is a 3-wire cord; the base unit is coupled to the telephone distribution system by two of the three wires; and the antenna comprises the third wire. ### Claim 5 (depends on 2) The cordless telephone system of claim 2 wherein the antenna terminates short of the outer end of the telephone cord. ### Claim 6 (depends on 3, 4) The cordless telephone system of claim 3 or 4 wherein the wires in said telephone cord run the full lengths of the telephone cord, and the wire therein forming said antenna is cut to form a gap therein. ### Claim 7 (depends on 6) The cordless telephone system of claim 6 wherein the gap in said wire is formed by cutting away the telephone cord at the location where the points of said wire to be cut are exposed, and wherein the cut away portion of said telephone cord is covered by a patch which hides the gap from view. ### Claim 8 (depends on 2, 3) The cordless telephone system of claim 2, 3, or 4 wherein said antenna terminates prior to the end of said telephone cord. ### Claim 9 (depends on 7) The antenna of claim 7 wherein the antenna terminates prior to the end of the telephone cord. ### Claim 10 (depends on 1, 2) The antenna of claim 1 or 2 wherein the handset includes a handset antenna for transmitting and receiving the duplex radio communication with the base unit, the handset antenna being integrally contained within the handset. ### Claim 11 In a telephone system comprising: a based unit and a portable handset coupled to the base unit by a duplex radio communication link and which is devoid of any antenna which extends or can be extended to project substantially from the handset, said base unit being coupled via wires contained in a telephone cord to a telephone distribution system; a handset coupled to the base unit by a duplex radio communication link; and a base unit antenna for receiving the duplex radio communication with the handset, the base unit antenna being integrally contained in the telephone cord by being a wire separate and distinct from the telephone wires by being spaced therefrom. ### Claim 12 (depends on 1, 2, 11) The cordless telephone system of anyone of claims 1, 2 or 11 wherein the base unit has a housing adapted to be mounted on a vertical wall adjacent to a telephone line connector, said telephone cord being of a length to reach a remotely located telephone line connector when the housing is mounted elsewhere on a table or the like, said telephone cord being coiled many times and secured to the base unit housing, the end of said telephone cord being electrically connected to said telephone line connector. ### Claim 13 (depends on 12) The cordless telephone system of claim 12 mounted on said vertical wall and said telephone cord is wrapped many times around the periphery of said housing. ### Claim 14 (depends on 2, 11) The cordless telephone system of claim 2 or 11 wherein said base unit has a power cord insertable into a commercial power line receptacle.