DC

David N. Critchlow

IM International Mobile Machines: 15 patents #3 of 36Top 9%
IT Interdigital Technology: 8 patents #126 of 338Top 40%
HA Hughes Aircraft: 3 patents #508 of 2,963Top 20%
HL Hughes Electronics Limited: 1 patents #605 of 1,474Top 45%
📍 San Diego, CA: #1,394 of 23,606 inventorsTop 6%
🗺 California: #18,844 of 386,348 inventorsTop 5%
Overall (All Time): #140,146 of 4,157,543Top 4%
28
Patents All Time

Issued Patents All Time

Showing 1–25 of 28 patents

Patent #TitleCo-InventorsDate
6724851 FIR chip for use in a wireless subscriber unit Moshe Yehushua, Graham M. Avis, Wade L. Heimbigner, Karle J. Johnson, George Alan Wiley 2004-04-20
6587516 Subscriber unit producing a modulated digital frequency Moshe Yehushua, Graham M. Avis, Wade L. Heimbigner, Karle J. Johnson, George Alan Wiley 2003-07-01
6449317 Digital synthesizer Moshe Yehushua, Graham M. Avis, Wade L. Heimbigner, Karle J. Johnson, George Alan Wiley 2002-09-10
6078629 Digital synthesizer Moshe Yehushua, Graham M. Avis, Wade L. Heimbigner, Karle J. Johnson, George Alan Wiley 2000-06-20
5859883 Subscriber unit for wireless digital subscriber communication system Moshe Yehushua, Graham M. Avis, Wade L. Heimbigner, Karle J. Johnson, George Alan Wiley 1999-01-12
5842137 Subscriber unit for wireless digital telephone system Graham M. Avis, Sandra J. K. Earlam, Karle J. Johnson, Bruce A. Smetana, Gregory L. Westling +2 more 1998-11-24
5694430 Subscriber unit for wireless digital subscriber communication system Moshe Yehushua, Graham M. Avis, Wade L. Heimbigner, Karle J. Johnson, George Alan Wiley 1997-12-02
5659576 Balanced processing based on receiver selection Michael Parr, Long Huynh 1997-08-19
5644602 Direct digital frequency synthesizer for use in a subscriber unit of a wireless digital communication system Karle J. Johnson 1997-07-01
5325396 Subscriber unit for wireless digital subscriber communication system Moshe Yehushua, Graham M. Avis, Wade L. Heimbigner, Karle J. Johnson, George Alan Wiley 1994-06-28
5311545 Modem for fading digital channels affected by multipath 1994-05-10
5282226 System and method for transmission of bursts of digital information 1994-01-25
5276706 System and method for minimizing frequency offsets between digital communication stations 1994-01-04
5177741 Subscriber unit for wireless digital telephone system Graham Avis, Sandra J. K. Earlam, Karle J. Johnson, Bruce A. Smetana, Gregory L. Westling +2 more 1993-01-05
5168507 Automatic adaptive equalizer Graham M. Avis, Sandra J. K. Earlam, Karle J. Johnson, Bruce A. Smetana, Gregory L. Westling +2 more 1992-12-01
5159705 Frequency synthesizer circuit Graham M. Avis, Sandra J. K. Earlam, Karle J. Johnson, Bruce A. Smetana 1992-10-27
5146473 Subscriber unit for wireless digital subscriber communication system Moshe Yehushua, Graham M. Avis, Wade L. Heimbigner, Karle J. Johnson 1992-09-08
5101418 Digital time-multiplexed quadrature frequency upconverter Graham M. Avis, Sandra J. K. Earlam, Karle J. Johnson, Bruce A. Smetana, Gregory L. Westling +2 more 1992-03-31
5067141 Interpolator for varying a signal sampling rate Graham M. Avis, Sandra J. K. Earlam, Karle J. Johnson, Bruce A. Smetana, Gregory L. Westling +2 more 1991-11-19
5008900 Subscriber unit for wireless digital subscriber communication system Moshe Yehushua, Graham M. Avis, Wade L. Heimbigner, Karle J. Johnson, George Alan Wiley 1991-04-16
4996697 Deglitching means for digital communication systems Graham M. Avis, Sandra J. K. Earlam, Karle J. Johnson, Bruce A. Smetana, Gregory L. Westling +2 more 1991-02-26
4994802 Subscriber unit for wireless digital telephone system Graham M. Avis, Sandra J. K. Earlam, Karle J. Johnson, Bruce A. Smetana, Gregory L. Westling +2 more 1991-02-19
4943983 Subscriber unit for wireless digital telephone system 1990-07-24
4893317 Digital signals and frequency correction in a digital wireless system Graham M. Avis, Sandra J. K. Earlam, Karle J. Johnson, Bruce A. Smetana, Gregory L. Westling +2 more 1990-01-09
4881240 AM equalizer circuit for digital systems Graham M. Avis, Sandra J. K. Earlam, Karle J. Johnson, Bruce A. Smetana, Gregory L. Westling +2 more 1989-11-14