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Walter J. Grandfield
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Lake Worth, FL, US
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Patents Grants
last 30 patents
Information
Patent Grant
RF multiband transmitter with balun
Patent number
8,068,795
Issue date
Nov 29, 2011
FREESCALE SEMICONDUCTOR, INC.
Amit D. Bavisi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Radio having a fast adapting direct conversion receiver
Patent number
6,006,079
Issue date
Dec 21, 1999
Motorola, Inc.
James I. Jaffee
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Feed-forward RSSI assisted radio frequency amplifier power control
Patent number
5,740,524
Issue date
Apr 14, 1998
Motorola, Inc.
Gary Lee Pace
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Differential feed-forward amplifier power control for a radio recei...
Patent number
5,564,092
Issue date
Oct 8, 1996
Motorola, Inc.
Walter Grandfield
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Diode loaded feed-forward radio frequency amplifier power control
Patent number
5,535,444
Issue date
Jul 9, 1996
Walter Grandfield
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Stacked double balanced mixer circuit
Patent number
5,448,772
Issue date
Sep 5, 1995
Motorola, Inc.
Walter J. Grandfield
H03 - BASIC ELECTRONIC CIRCUITRY
Information
Patent Grant
Heterodyne stage having precise closed-loop control of the amplitud...
Patent number
4,928,314
Issue date
May 22, 1990
Motorola, Inc.
Walter J. Grandfield
H03 - BASIC ELECTRONIC CIRCUITRY
Information
Patent Grant
Pager receiver having a common timer circuit for both sequential lo...
Patent number
4,928,086
Issue date
May 22, 1990
Motorola, Inc.
George Drapac
G08 - SIGNALLING
Information
Patent Grant
Constant propagation delay current reference
Patent number
4,862,015
Issue date
Aug 29, 1989
Motorola, Inc.
Walter J. Grandfield
G05 - CONTROLLING REGULATING
Information
Patent Grant
Paging terminal apparatus with page forwarding capability and metho...
Patent number
4,814,763
Issue date
Mar 21, 1989
Motorola, Inc.
Leonard E. Nelson
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Speak back paging system
Patent number
4,811,379
Issue date
Mar 7, 1989
Motorola, Inc.
Walter J. Grandfield
G08 - SIGNALLING
Patents Applications
last 30 patents
Information
Patent Application
RF Multiband Transmitter with Balun
Publication number
20100248660
Publication date
Sep 30, 2010
Amit D. Bavisi
H04 - ELECTRIC COMMUNICATION TECHNIQUE