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Your search returned 80 patents.
( 381/336 in Current US Classification ) |
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| 1 |
| Patent ID | Title | Date Filed |
| 5212732 | Effects speaker system
| March 5, 1992 |
| 5199075 | Surround sound loudspeakers and processor
| November 14, 1991 |
| 5131052 | Mid-range loudspeaker assembly propagating forward and backward sound waves in phase
| January 6, 1989 |
| 5125031 | Speaker system with focused vibration
| August 14, 1991 |
| 5119429 | Audio installation, in particular stereophonic, for television sets with a large built-in low-frequency loudspeaker
| December 20, 1989 |
| 5109423 | Audio system with amplifier and signal device
| October 25, 1990 |
| 5097514 | Equilateral tetrahedral speaker system
| May 25, 1988 |
| 5088574 | Ceiling speaker system
| April 16, 1990 |
| 5025473 | Hemispherical speaker system
| August 24, 1989 |
| 4967872 | Loud speaker system
| June 19, 1989 |
| 4961227 | Portable loud speaker system
| September 28, 1989 |
| 4953223 | Speaker mounting system
| September 8, 1988 |
| 4888804 | Sound reproduction system
| May 12, 1988 |
| 4882753 | Passive ambience recovery system for the reproduction of sound
| January 12, 1989 |
| 4881265 | Apex loudspeaker
| September 13, 1988 |
| 4865153 | Speaker system
| May 29, 1987 |
| 4862508 | Method for large-scale multiple source sound reinforcement
| June 10, 1987 |
| 4837826 | Stereophonic baffle
| April 14, 1987 |
| 4776018 | Removable sound or/and display apparatus
| April 24, 1986 |
| 4764960 | Stereo reproduction system
| July 8, 1987 |
| 4646349 | Equipment for the stereophonic sound reproduction in a television receiver
| February 11, 1985 |
| 4475620 | Loudspeaker with wall reflex absorber
| November 23, 1982 |
| 4418243 | Acoustic projection stereophonic system
| February 16, 1982 |
| 4357490 | High fidelity loudspeaker system for aurally simulating wide frequency range point source of sound
| July 18, 1980 |
| 4306120 | Sound emitter
| March 31, 1980 |
| 4284844 | Loudspeaker system
| May 7, 1979 |
| 4251687 | Stereophonic sound reproducing system
| January 12, 1979 |
| 4249037 | Pyramid loudspeakers with twin cross-phased mid-range speakers
| November 8, 1978 |
| 4227050 | Virtual sound source system
| January 11, 1979 |
| 4224467 | Corner mounted sound reproduction speaker apparatus
| June 26, 1978 |
| 4218583 | Varying loudspeaker spatial characteristics
| July 28, 1978 |
| 4194086 | Suspended stereo console and light show
| December 7, 1977 |
| 4133975 | Loudspeaker system with broad image source with directionality control for the tweeter
| January 24, 1977 |
| 4123621 | Acoustical speaker device
| December 5, 1977 |
| 4051919 | High fidelity speaker enclosure
| December 8, 1975 |
| 4038499 | Stereophonic pillow speaker system
| February 2, 1976 |
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