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1927-08-01 |
1930-10-21 |
Bell Telephone Labor Inc |
Negative impedance circuit
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1927-08-01 |
1930-10-21 |
Bell Telephone Labor Inc |
Negative impedance circuits
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1927-08-01 |
1930-10-21 |
Bell Telephone Labor Inc |
Negative resistance circuits
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1928-09-21 |
1931-09-08 |
Toulon Pierre Marie Gabriel |
System for transmitting and amplifying vibratory currents and movements
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1929-05-21 |
1937-12-21 |
Bell Telephone Labor Inc |
Wave translation system
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*
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1936-06-23 |
1937-11-23 |
American Telephone & Telegraph |
Circuits embodying negative impedance
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1937-07-13 |
1940-03-19 |
Telefunken Gmbh |
Distortion reducing arrangement
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1954-02-01 |
1958-11-11 |
Conrad Ivan Willard |
Sound reproducing system
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1954-05-19 |
1958-07-15 |
David Bogen & Company Inc |
Feed back amplifiers
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1955-08-08 |
1958-07-01 |
Electro Voice |
Sound producing device
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1955-12-01 |
1961-11-21 |
Bekey Ivan |
Sound reproduction system
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1956-05-07 |
1960-08-09 |
Warner W Clements |
Sound reproducing means
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1956-10-31 |
1959-05-19 |
Rca Corp |
Audio frequency amplifier
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1957-01-18 |
1962-07-31 |
Daniel E Winker |
High fidelity audio system
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1957-03-29 |
1963-01-15 |
Philo T Farnsworth |
Transducing apparatus
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1959-01-08 |
1962-10-09 |
Security First Nat Bank |
Self-correcting, high fidelity, sound reproducing apparatus
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1961-12-29 |
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1967-02-13 |
1970-09-22 |
Martin G Reiffin |
Motional feedback amplifier systems
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1969-06-20 |
1974-06-28 |
J Mullins |
Sound reproduction system with driven and undriven speakers and motional feedback
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1972-04-03 |
1974-03-19 |
Rene Oliveras |
Sound reproducing system utilizing motional feedback
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1972-09-11 |
1974-03-13 |
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1974-07-15 |
1979-10-09 |
Pioneer Electronic Corporation |
Piezoelectric transducer with multiple electrode areas
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1976-03-24 |
1977-12-12 |
Stahl Karl Erik |
Forfarande for forbettring av ett elektrodynamiskt hogtalarelements basatergivning, samt anordning for utforande av forfarandet
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1976-04-30 |
1979-12-25 |
Bang & Olufsen A/S |
Loudspeaker motional feedback system
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1978-01-27 |
1980-05-21 |
Philips Nv |
Electrodynamic loudspeaker
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1979-08-17 |
1981-06-30 |
Meyers Stanley T |
Sound reproducing system utilizing motional feedback and velocity-frequency equalization
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1981-02-20 |
1985-10-29 |
Meyers Stanley T |
Sound reproducing system utilizing motional feedback and an improved integrated magnetic structure
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JPS58182998A
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1982-04-20 |
1983-10-26 |
Pioneer Electronic Corp |
Mfb型スピ−カ
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1982-04-28 |
1984-06-19 |
Bose Corporation |
Headphoning
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1982-04-28 |
1985-01-15 |
Bose Corporation |
Feedback control
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1983-08-12 |
1983-09-14 |
Linn Prod Ltd |
Loudspeaker with notional feedback
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1983-10-19 |
1986-02-25 |
Velodyne Acoustics, Inc. |
Loudspeaker with high frequency motional feedback
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1985-06-14 |
1987-01-02 |
Philips Nv |
Basreflex luidsprekersysteem.
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1986-02-14 |
1988-02-23 |
Velodyne Acoustics, Inc. |
Loudspeaker with motional feedback
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1986-07-08 |
1988-02-01 |
Philips Nv |
Inrichting voor het omzetten van een elektrisch signaal in een akoestisch signaal, voorzien van een elektrostatische omzettereenheid.
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1986-10-24 |
1989-04-11 |
Stanislaw Drozdowski |
Sound reproducing system with Hall effect motional feedback
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1987-06-02 |
1991-07-09 |
Yamaha Corporation |
Dynamic loudspeaker driving apparatus
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JPS6490700A
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1987-09-30 |
1989-04-07 |
Yamaha Corp |
Motional load driving circuit
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1988-03-10 |
1991-04-23 |
Yamaha Corporation |
Acoustic apparatus
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1988-03-25 |
1994-11-30 |
Yamaha Corporation |
Acoustic Apparatus
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EP0340435A3
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1988-04-01 |
1991-04-24 |
Yamaha Corporation |
Acoustic apparatus
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JPH01272298A
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1988-04-25 |
1989-10-31 |
Yamaha Corp |
駆動装置
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DE68925434T2
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1988-04-25 |
1996-11-14 |
Yamaha Corp |
Elektroakustische Antriebsschaltung
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EP0361445A3
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1988-09-28 |
1991-05-22 |
Yamaha Corporation |
Acoustic apparatus
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1988-10-17 |
1995-08-23 |
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駆動装置の温度補償回路
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JPH0322798A
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1989-06-20 |
1991-01-31 |
Yamaha Corp |
パワーアンプ用アダプタ
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JP2535232B2
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1989-12-16 |
1996-09-18 |
シャープ株式会社 |
音声出力回路
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1989-12-26 |
1994-01-18 |
Yamaha Corporation |
Acoustic apparatus and driving apparatus constituting the same
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1989-12-26 |
2000-04-24 |
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音響装置およびこのような音響装置を構成するための駆動装置
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1991-04-18 |
1993-03-23 |
Josef Lakatos |
Electrodynamic loudspeaker with electromagnetic impedance sensor coil
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1992-11-18 |
1995-02-28 |
Advanced Composite Audio, Inc. |
Low frequency sound generation system for use in vehicular passenger compartments
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JP3187599B2
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1993-03-17 |
2001-07-11 |
川澄化学工業株式会社 |
医療用バッグ及びその製造方法
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JP3136853B2
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1993-08-16 |
2001-02-19 |
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スピーカユニット
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1993-12-13 |
1995-04-18 |
Reiffin; Martin |
Motional feedback speaker system with radially polarized magnet and underhung voice-coil
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1993-12-20 |
1996-02-20 |
Pulfrey; Robert E. |
High fidelity sound reproducing system
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1994-12-06 |
1996-07-30 |
Reiffin; Martin |
Smart amplifier for loudspeaker motional feedback derived from linearization of a nonlinear motion responsive signal
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1995-12-12 |
1998-06-09 |
Ding; Chih-Shun |
Speaker and amplifier system
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1996-12-12 |
2000-08-15 |
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Speaker and amplifier system
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1998-09-03 |
2006-09-26 |
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Low frequency feedback controlled audio system
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1998-12-25 |
2002-06-24 |
ヤマハ株式会社 |
音響装置
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1999-12-01 |
2001-06-08 |
Matsushita Electric Ind Co Ltd |
スピーカ装置
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CA2408045A1
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2001-10-16 |
2003-04-16 |
Audio Products International Corp. |
Loudspeaker with large displacement motional feedback
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2003-12-22 |
2006-05-30 |
Tymphany Corporation |
Mixed-mode (current-voltage) audio amplifier
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2005-09-14 |
2007-03-29 |
Matsushita Electric Ind Co Ltd |
スピーカ装置
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JP4519041B2
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2005-09-20 |
2010-08-04 |
ローランド株式会社 |
楽器用スピーカ装置
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JP4721859B2
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2005-10-13 |
2011-07-13 |
シャープ株式会社 |
オーディオアンプ
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2005-12-22 |
2007-07-05 |
Mikael Bohman |
Digital feedback to improve the sound reproduction of an electro-dynamic loudspeaker
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2005-12-29 |
2007-10-10 |
颜怀伟 |
阻抗与功率可变式扬声器及其功放与控制电路
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2008-09-30 |
2012-04-10 |
David William Bray |
Post phase-inverter volume control
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