International Mobile Machines

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
H04B TRANSMISSION 3207
 
  
 
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
5212830 Radio frequency communications systemMay 31, 91May 18, 93[H04Q, H04B]
5159705 Frequency synthesizer circuitMar 13, 92Oct 27, 92[H04B]
5146473 Subscriber unit for wireless digital subscriber communication systemFeb 20, 91Sep 08, 92[H04B]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5235670 Multiple impulse excitation speech encoder and decoderExpiredOct 03, 90Aug 10, 93[G10L]
5177741 Subscriber unit for wireless digital telephone systemExpiredOct 12, 88Jan 05, 93[H04J]
5168507 Automatic adaptive equalizerExpiredNov 09, 89Dec 01, 92[H03H]
5121391 Subscriber RF telephone system for providing multiple speech and/or data singals simultaneously over either a single or a plurality of RF channelsExpiredNov 20, 89Jun 09, 92[H04J]
5119375 Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of RF channelsExpiredDec 27, 90Jun 02, 92[H04J]
5072308 Communication signal compression system and methodExpiredNov 26, 90Dec 10, 91[H04N]
5067141 Interpolator for varying a signal sampling rateExpiredOct 10, 89Nov 19, 91[H04L]
5022024 Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of RF channelsExpiredMay 08, 89Jun 04, 91[H04J]
5008900 Subscriber unit for wireless digital subscriber communication systemExpiredAug 14, 89Apr 16, 91[H04B]
4996697 Deglitching means for digital communication systemsExpiredOct 12, 88Feb 26, 91[H04B]
4994802 Subscriber unit for wireless digital telephone systemExpiredOct 12, 88Feb 19, 91[H03M]
4974099 Communication signal compression system and methodExpiredJun 21, 89Nov 27, 90[H04N]
4953197 Combination spatial diversity systemExpiredDec 08, 88Aug 28, 90[H04B]
4943983 Subscriber unit for wireless digital telephone systemExpiredOct 12, 88Jul 24, 90[H04L]
4940956 Band-pass filter and support structure thereforExpiredSep 21, 88Jul 10, 90[H01P]
4935927 Base station emulatorExpiredNov 20, 87Jun 19, 90[H04J]
4912705 Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of RF channelsExpiredMar 16, 89Mar 27, 90[H04J]
4893317 Digital signals and frequency correction in a digital wireless systemExpiredOct 12, 88Jan 09, 90[H04L]
4881240 AM equalizer circuit for digital systemsExpiredOct 12, 88Nov 14, 89[H03K, H03H]
4862107 Frequency synthesizer for broadcast telephone system having multiple assignable frequency channelsExpiredJun 27, 88Aug 29, 89[H03L]

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