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Digital to analogue convertors
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Patent number 5,105,193
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Issue date Apr 14, 1992
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Marconi Electronic Devices Limited
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Alexander W. Vogt
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H03 - BASIC ELECTRONIC CIRCUITRY
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Variable current source
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Patent number 4,349,777
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Issue date Sep 14, 1982
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Takeda Riken Kogyo Kabushikikaisha
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Masakazu Mitamura
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G05 - CONTROLLING REGULATING
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Digital coder
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Patent number 3,935,569
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Issue date Jan 27, 1976
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Compagnie Industrielle des Telecommunications Cit-Alcatel
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Francois Marcel
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H03 - BASIC ELECTRONIC CIRCUITRY
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3895378
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Patent number 3,895,378
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Issue date Jul 15, 1975
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H03 - BASIC ELECTRONIC CIRCUITRY
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3890602
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Patent number 3,890,602
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Issue date Jun 17, 1975
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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3848195
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Patent number 3,848,195
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Issue date Nov 12, 1974
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H03 - BASIC ELECTRONIC CIRCUITRY
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3836906
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Patent number 3,836,906
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Issue date Sep 17, 1974
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G11 - INFORMATION STORAGE
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3825925
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Patent number 3,825,925
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Issue date Jul 23, 1974
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H03 - BASIC ELECTRONIC CIRCUITRY
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3816825
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Patent number 3,816,825
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Issue date Jun 11, 1974
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H03 - BASIC ELECTRONIC CIRCUITRY
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3789389
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Patent number 3,789,389
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Issue date Jan 29, 1974
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H03 - BASIC ELECTRONIC CIRCUITRY
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3766543
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Patent number 3,766,543
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Issue date Oct 16, 1973
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G05 - CONTROLLING REGULATING
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3737891
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Patent number 3,737,891
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Issue date Jun 5, 1973
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H03 - BASIC ELECTRONIC CIRCUITRY
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3729732
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Patent number 3,729,732
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Issue date Apr 24, 1973
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H03 - BASIC ELECTRONIC CIRCUITRY
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3705359
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Patent number 3,705,359
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Issue date Dec 5, 1972
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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3699568
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Patent number 3,699,568
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Issue date Oct 17, 1972
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H03 - BASIC ELECTRONIC CIRCUITRY
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3696391
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Patent number 3,696,391
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Issue date Oct 3, 1972
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G06 - COMPUTING CALCULATING COUNTING
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3684968
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Patent number 3,684,968
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Issue date Aug 15, 1972
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H03 - BASIC ELECTRONIC CIRCUITRY
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3676600
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Patent number 3,676,600
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Issue date Jul 11, 1972
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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3668693
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Patent number 3,668,693
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Issue date Jun 6, 1972
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H03 - BASIC ELECTRONIC CIRCUITRY
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3657658
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Patent number 3,657,658
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Issue date Apr 18, 1972
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G05 - CONTROLLING REGULATING
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3653033
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Patent number 3,653,033
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Issue date Mar 28, 1972
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H03 - BASIC ELECTRONIC CIRCUITRY
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3646587
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Patent number 3,646,587
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Issue date Feb 29, 1972
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H03 - BASIC ELECTRONIC CIRCUITRY
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3641563
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Patent number 3,641,563
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Issue date Feb 8, 1972
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G11 - INFORMATION STORAGE
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3641564
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Patent number 3,641,564
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Issue date Feb 8, 1972
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G02 - OPTICS
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3641566
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Patent number 3,641,566
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Issue date Feb 8, 1972
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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3634770
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Patent number 3,634,770
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Issue date Jan 11, 1972
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G06 - COMPUTING CALCULATING COUNTING
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3626407
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Patent number 3,626,407
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Issue date Dec 7, 1971
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H03 - BASIC ELECTRONIC CIRCUITRY