Trio Kabushiki Kaisha

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
H03K PULSE TECHNIQUE 2129
 
  
 
G06G ANALOGUE COMPUTERS 152
 
  
 
H04B TRANSMISSION 1209

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
RE30949 Digital frequency display deviceFeb 08, 80May 25, 82[H04B]
RE30839 Monostable multivibratorFeb 08, 80Dec 29, 81[H03K]
RE30781 Logarithmic amplifierAug 15, 80Oct 20, 81[H03K, G06G]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4903031 Satellite receiverExpiredOct 20, 87Feb 20, 90[H01Q]
4873684 Method and apparatus for multiplexing of input signals having differing frequencies and demultiplexing sameExpiredSep 19, 88Oct 10, 89[H04J]
4862179 Satellite receiverExpiredFeb 13, 89Aug 29, 89[H01Q]
4850030 Radio communication system for communicating between two stations upon automatic switching to an idle communication channelExpiredOct 28, 87Jul 18, 89[H04Q, H04B]
4845436 Frequency synthesizer suited for use in a time division multiplexing systemExpiredApr 07, 88Jul 04, 89[H03B, H04J]
4825436 Time division multiplexing system for N channels in a frame unit baseExpiredAug 25, 88Apr 25, 89[H04J]
4783824 Speaker unit having two voice coils wound around a common coil bobbinExpiredOct 18, 85Nov 08, 88[H04R]
4772513 Method for forming a hard carbon thin film on article and applications thereofExpiredNov 04, 87Sep 20, 88[B32B]
4768033 Callsign display for transceiverExpiredSep 17, 87Aug 30, 88[H04Q, H04B]
4725345 Method for forming a hard carbon thin film on article and applications thereofExpiredApr 17, 86Feb 16, 88[C23C]
4716576 Apparatus for controlling transmitter-receiverExpiredJul 16, 84Dec 29, 87[H04B]
4710962 Signal control apparatusExpiredNov 13, 85Dec 01, 87[H03G]
4698776 Recording/reproducing apparatusExpiredMay 23, 84Oct 06, 87[G10L]
4677258 Information producing apparatusExpiredJan 17, 86Jun 30, 87[G08C]
4668921 Power supply circuitExpiredOct 22, 84May 26, 87[H03F]
4612511 FM demodulator including PLL and improved circuitry for eliminating distortion in the output thereofExpiredOct 18, 83Sep 16, 86[H03D]
4598426 Variable intermediate bandwidth AM receiverExpiredApr 04, 84Jul 01, 86[H04B]
4577342 Distortion cancel circuit in FM stereoExpiredFeb 29, 84Mar 18, 86[H04H]
4573019 Current mirror circuitExpiredMar 12, 84Feb 25, 86[H03F]
4564815 FM Demodulator PLL with compensation for nonlinear varactor characteristicsExpiredFeb 14, 84Jan 14, 86[H03L, H04B, H03D]

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