Allen; Derek R.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Allen; Derek R..The latest application filed is for "disposable stethoscope".
- Allen; Derek R. - San Juan Capistrano CA
- Allen; Derek R. - Newport Beach CA
- Allen; Derek R. - Corona del Mar CA
- Allen; Derek R. - Montrose CA
| Patent | Date |
|---|---|
| Disposable stethoscope Grant D323,033 - Allen January 7, 1 | 1992-01-07 |
| Enhanced audiotransmission stethoscope Grant 4,569,413 - Allen February 11, 1 | 1986-02-11 |
| Dual stethoscope microphone Grant D256,951 - Allen September 16, 1 | 1980-09-16 |
| Angularly related dual stethoscope head Grant 4,212,368 - Allen July 15, 1 | 1980-07-15 |
| Stethoscope With High Intensity Audio Output Grant 3,570,625 - Allen March 16, 1 | 1971-03-16 |
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