Her Majesty the Queen in right of Canada, as represented by the Minister of Communications

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
G02B OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS 5200
 
  
 
H04K SECRET COMMUNICATION; JAMMING OF COMMUNICATION256
 
  
 
G01S RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES1108
 
  
 
H01L SEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR 1361
 
  
 
H01Q AERIALS 1109
 
  
 
H03M CODING, DECODING OR CODE CONVERSION, IN GENERAL 1110
 
  
 
H04Q SELECTING 1109

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
6700537 Method for calibrating a wideband direction finding systemAug 30, 01Mar 02, 04[G01S]
6292092 Secure personal identification instrument and method for creating sameMay 07, 96Sep 18, 01[H04Q]
5638404 Pre-compensated frequency modulation (PFM)Mar 21, 96Jun 10, 97[H04K]
5579342 Pre-compensated frequency modulation (PFM)Sep 22, 94Nov 26, 96[H04K]
5495548 Photosensitization of optical fiber and silica waveguidesFeb 16, 94Feb 27, 96[G02B]
5432524 Drive arrangement for mechanically-steered antennasMar 01, 93Jul 11, 95[H01Q]
5367588 Method of fabricating Bragg gratings using a silica glass phase grating mask and mask used by sameOct 29, 92Nov 22, 94[H01L, G02B]
5245340 Digital transmultiplexer with automatic threshold controllerFeb 14, 92Sep 14, 93[H03M]
5216739 Method of creating an index grating in an optical fiber and a mode converter using the index gratingDec 20, 91Jun 01, 93[G02B]
5150439 Simplified WDM fused fiber coupler designMay 22, 91Sep 22, 92[G02B]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5864544 TDD communication system which receives timing signals from a satellite and automatically, successively, repetitively, and alternatingly transmits and receives compressed signals in a single channelExpiredMay 20, 96Jan 26, 99[H04L, H04B, H04J]
5619215 Compact antenna steerable in azimuth and elevationExpiredJul 10, 95Apr 08, 97[H01Q]
5574823 Frequency selective harmonic codingExpiredJun 23, 93Nov 12, 96[G10L]
5479182 Short conical antennaExpiredMar 01, 93Dec 26, 95[H01Q]
5303419 Aperture-coupled line Magic-Tee and mixer formed therefromExpiredMay 29, 92Apr 12, 94[H01P, H04B]
5187872 Automatic calibration of magnetic compassesExpiredApr 02, 92Feb 23, 93[G01C]
5153601 Microwave polarizing lens structureExpiredApr 04, 91Oct 06, 92[H01Q]
5054874 Coupler fabrication techniques for dissimilar fibersExpiredDec 17, 90Oct 08, 91[G02B]
5045862 Dual polarization microstrip array antennaExpiredDec 07, 89Sep 03, 91[H01Q]
5004316 Coupler fabrication techniques for dissimilar fibersExpiredJan 09, 86Apr 02, 91[G02B]
4955562 Microwave powered aircraftExpiredNov 16, 88Sep 11, 90[B64C]
4868575 Phase slope equalizer for satellite antennasExpiredNov 30, 87Sep 19, 89[H01P]
4833428 14/12 GHz DuplexerExpiredNov 30, 87May 23, 89[H01P]

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