Telecommunications – Transmitter and receiver at same station – Having particular housing or support of a transceiver
Patent
1996-07-31
1998-10-06
Crosland, Donnie L.
Telecommunications
Transmitter and receiver at same station
Having particular housing or support of a transceiver
455575, 455550, 455 97, 455106, 455300, 379428, 379431, 379437, 379440, 379 52, 343841, 343851, 343872, 361818, H04B 138, H01Q 152
Patent
active
058191623
ABSTRACT:
An electromagnetic interference (EMI) shield for a handheld cellular phone that is particularly useful for shielding a hearing aid against EMI from the phone's antenna. The device includes a base and a flap laminated with a metallic shielding. The base attaches to the receiver end of the cellular phone and the flap rests over the base when the phone is not in use. In operation, the flap extends away from the base forming an enclosure about the user's ear for shielding the hearing aid from EMI when the phone is in use.
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patent: 5657386 (1997-08-01), Schwanke
J. Ross Le Strange, et al., "Interference to Hearing Aids by the Digital Mobile Telephone System, Global System for Mobile Communications (GMS)", National Acoustic Labs Report No. 131, May 1995.
Lynch Michael J.
Spann Charles L.
Crosland Donnie L.
Northern Telecom Limited
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