GIBSON PIANO VENTURES, INC.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4731729 Electronic digital dual sequential timing control apparatus for environmental systemsExpiredOct 27, 86Mar 15, 88[G06F]
4674386 Augmented bass hammer striking distance for pianosExpiredJun 21, 85Jun 23, 87[G10C]
4655113 Rythm rate and tempo monitor for electronic musical instruments having automatic rhythm accompanimentExpiredFeb 04, 82Apr 07, 87[G10F]
4602548 Tone compensator for piano soundboardsExpiredJun 21, 85Jul 29, 86[G10C]
4470333 Generation of musical tones from multiplexed serial dataExpiredDec 17, 82Sep 11, 84[G10H]
4449437 Automatic pianoExpiredSep 21, 81May 22, 84[G10H]
4444081 Arpeggio generating system and methodExpiredJun 04, 82Apr 24, 84[G10F]
4442746 Electronic organ having an improved tone generator systemExpiredJun 26, 80Apr 17, 84[G10H]
D273015 OrganExpiredJun 15, 81Mar 13, 84[]
D272746 OrganExpiredJun 15, 81Feb 21, 84[D170]
4428270 Electronic vibrato or celesteExpiredNov 16, 81Jan 31, 84[G10H]
4417496 Velocity sensitive keyer control circuit for an electronic musical instrumentExpiredJun 15, 81Nov 29, 83[G10H]
4412470 System for communicating data among microcomputers in an electronic musical instrumentExpiredJun 08, 81Nov 01, 83[G10H]
4407292 Procedure and apparatus for noncontacting measurement of subcutaneous temperature distributionsExpiredJan 21, 81Oct 04, 83[A61B]
4400668 Period proportional two-phase voltage controlled oscillatorExpiredJun 19, 81Aug 23, 83[H03K]
4393740 Programmable tone generatorExpiredJan 02, 81Jul 19, 83[G10H]
4391177 Piano soundboard and method of making sameExpiredJun 21, 82Jul 05, 83[G10C]
4389914 Chord identification system for electronic musical instrumentsExpiredJun 18, 81Jun 28, 83[G10H]
4388850 Multiple octave generator tuning systemExpiredApr 14, 80Jun 21, 83[G10H]
4388851 Non-volatile memory system for an electronic musical instrumentExpiredSep 24, 80Jun 21, 83[G10H]

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