|
| US3987862 | 25 Sep 1974 | 26 Oct 1976 | Donaldson Company, Inc. | Offset air intake hood |
| US3991273 | 4 Oct 1943 | 9 Nov 1976 | Bell Telephone Laboratories, Incorporated | Speech component coded multiplex carrier wave transmission |
| US4449249 | 27 Sep 1982 | 15 May 1984 | | Televison programming information system |
| US5170486 | 2 Apr 1990 | 8 Dec 1992 | Marconi Instruments Limited | Apparatus for synthesizing a composite RF signal suitable for use as a test signal in testing adjacent channel rejection of radio receivers |
| US5415181 | 1 Dec 1993 | 16 May 1995 | The Johns Hopkins University | AM/FM multi-channel implantable/ingestible biomedical monitoring telemetry system |
| US6185201 | 6 Nov 1998 | 6 Feb 2001 | Fujitsu Limited | Multiplex radio transmitter and multiplex radio transmission method, multiplex radio receiver and multiplex radio receiving method, and multiplex radio transceiver and multiplex transmission/receiving system |
| US6973328 | 7 Jun 2000 | 6 Dec 2005 | Sharp Kabushiki Kaisha | Millimeter wave band transmitter, millimeter wave band receiver and millimeter wave band communication apparatus carrying out radio communication in millimeter wave band region |
| US7343015 | 31 May 2001 | 11 Mar 2008 | Radio Shack Corporation | Method and apparatus for high fidelity wireless stereophonic transmission utilizing dual frequency carriers |