Inventor · disambiguated record
Walter J. Grandfield
Also filed as: GRANDFIELD WALTER · GRANDFIELD WALTER J
11 granted patents·664 citations·filing 1987–2009
93Inventor score
Top patents by PatentIndex Score
11 records- 0191US5740524AFeed-forward RSSI assisted radio frequency amplifier power controlMOTOROLA INC·Filed 1995·Granted Apr 14, 1998·73 cites·19 claims
- 0291US5448772AStacked double balanced mixer circuitMOTOROLA INC·Filed 1994·Granted Sep 5, 1995·116 cites·19 claims
- 0388US8068795B2RF multiband transmitter with balunBAVISI AMIT D·Filed 2009·Granted Nov 29, 2011·25 cites·20 claims
- 0488US4814763APaging terminal apparatus with page forwarding capability and methodology thereofMOTOROLA INC·Filed 1987·Granted Mar 21, 1989·192 cites·32 claims
- 0580US4862015AConstant propagation delay current referenceMOTOROLA INC·Filed 1988·Granted Aug 29, 1989·27 cites·15 claims
- 0678US6006079ARadio having a fast adapting direct conversion receiverMOTOROLA INC·Filed 1997·Granted Dec 21, 1999·61 cites·9 claims
- 0773US4928314AHeterodyne stage having precise closed-loop control of the amplitude of the injection signal thereofMOTOROLA INC·Filed 1989·Granted May 22, 1990·28 cites·10 claims
- 0873US4811379ASpeak back paging systemMOTOROLA INC·Filed 1987·Granted Mar 7, 1989·96 cites·19 claims
- 0961US5564092ADifferential feed-forward amplifier power control for a radio receiver systemMOTOROLA INC·Filed 1994·Granted Oct 8, 1996·25 cites·18 claims
- 1048US5535444ADiode loaded feed-forward radio frequency amplifier power controlFiled 1995·Granted Jul 9, 1996·9 cites·9 claims
- 1133US4928086APager receiver having a common timer circuit for both sequential lock-out and out-of-rangeMOTOROLA INC·Filed 1989·Granted May 22, 1990·12 cites·8 claims
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