|
| US3939310 | 9. Aug. 1974 | 17. Febr. 1976 | | Stereophonic headset with ear to ear acoustical passageway |
| US3984636 | 6. März 1975 | 5. Okt. 1976 | Koss Corporation | Quadraphonic headphone with ambience programmer |
| US4110583 | 3. Febr. 1976 | 29. Aug. 1978 | | Earphone construction |
| US4173715 | 13. Jan. 1978 | 6. Nov. 1979 | | Acoustical device |
| US4821323 | 19. Febr. 1988 | 11. Apr. 1989 | | Stereo headphone |
| US5022486 | 20. Sept. 1989 | 11. Juni 1991 | Sony Corporation | Sound reproducing apparatus |
| US5186625 | 28. Nov. 1990 | 16. Febr. 1993 | Young Dental Manufacturing Company | Control for dental air-polisher |
| US5638343 | 13. Juli 1995 | 10. Juni 1997 | Sony Corporation Sony Electronics, Inc. | Method and apparatus for re-recording multi-track sound recordings for dual-channel playbacK |
| US5798922 | 24. Jan. 1997 | 25. Aug. 1998 | Sony Corporation Sony Pictures Entertainment, Inc. | Method and apparatus for electronically embedding directional cues in two channels of sound for interactive applications |
| US5824967 | 28. Okt. 1997 | 20. Okt. 1998 | Syracuse University | Ear muffler |
| US6002775 | 14. Aug. 1998 | 14. Dez. 1999 | Sony Corporation Sony Pictures Entertainment Inc. | Method and apparatus for electronically embedding directional cues in two channels of sound |
| US6009179 | 24. Jan. 1997 | 28. Dez. 1999 | Sony Corporation Sony Pictures Entertainment, Inc. | Method and apparatus for electronically embedding directional cues in two channels of sound |
| US6067361 | 16. Juli 1997 | 23. Mai 2000 | Sony Corporation Sony Electronics, Inc. | Method and apparatus for two channels of sound having directional cues |
| US6154545 | 12. Aug. 1998 | 28. Nov. 2000 | Sony Corporation Sony Pictures Entertainment, Inc. | Method and apparatus for two channels of sound having directional cues |
| US6356644 | 20. Febr. 1998 | 12. März 2002 | Sony Corporation Sony Electronics, Inc. | Earphone (surround sound) speaker |
| US8161974 | 18. Aug. 2009 | 24. Apr. 2012 | Syracuse University | Hearing protection apparatus with incorporated eyewear |
| USD266244 | 30. Mai 1979 | 21. Sept. 1982 | Pickering & Company, Inc. | Collapsible headset |
| USD579000 | 29. Juni 2007 | 21. Okt. 2008 | GN A/S | Headset |
| USD605171 | 27. Okt. 2008 | 1. Dez. 2009 | Koninklijke Philips Electronics N.V. | Headphone |