TOA CORPORATION

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
H04R LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS 2285
 
  
 
1401 EQUIPMENT FOR THE RECORDING OR REPRODUCTION OF SOUNDS OR PICTURES647
 
  
 
1403 COMMUNICATIONS EQUIPMENT, WIRELESS REMOTE CONTROLS AND RADIO AMPLIFIERS565
 
  
 
H04B TRANSMISSION 4206
 
  
 
G10K SOUND-PRODUCING DEVICES 332
 
  
 
H04M TELEPHONIC COMMUNICATION 3160
 
  
 
G06K RECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS 2196
 
  
 
H04S STEREOPHONIC SYSTEMS 229
 
  
 
E02B HYDRAULIC ENGINEERING 117
 
  
 
G01H MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES 120

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
9826307 Microphone array including at least three microphone unitsJun 11, 13Nov 21, 17[H04R]
9818430 Estimating sound source position with microphone array controlJun 11, 13Nov 14, 17[H04S, H04R, G10L]
9648413 Loudspeaker systemFeb 05, 13May 09, 17[H04S, H04R, G06F]
9565504 Speaker deviceJun 19, 12Feb 07, 17[H04R]
9131292 Wireless microphone systemDec 09, 11Sep 08, 15[H04L, H04R]
9118997 Speaker device and filter coefficient generating device thereforApr 26, 10Aug 25, 15[H04R]
8915672 Movable breakwater and method of operating movable breakwaterJun 04, 10Dec 23, 14[E02B]
8903118 Diaphragm and speakerMar 05, 08Dec 02, 14[G10K, H04R]
D714266 MicrophoneJun 07, 13Sep 30, 14[1401]
D712878 SpeakerJan 05, 12Sep 09, 14[1403]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2009/0303,328 SURVEILLANCE SYSTEM AND CONTROL APPARATUS THEREFORAbandonedSep 05, 06Dec 10, 09[H04N]
7551690 Transmitter and receiverExpiredFeb 25, 02Jun 23, 09[H03K]
2005/0207,595 Microphone apparatus built in computer networkAbandonedApr 05, 05Sep 22, 05[H04R]
6862332 Clock reproduction circuitExpiredAug 13, 03Mar 01, 05[H03K]
5148491 Automatic mixer apparatusExpiredAug 30, 90Sep 15, 92[H04B, H04R, H03G]
5020858 Method of and apparatus for forming and transporting mud clogsExpiredSep 28, 90Jun 04, 91[E02F]
4903419 Method of and apparatus for dredging sludge in high densityExpiredMay 24, 88Feb 27, 90[E02F]
4721126 Method of generating spiral fluid flow and the device thereforExpiredSep 08, 86Jan 26, 88[F16K]

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