US3221100A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for testing hearing
Assignee: Individual
•
Filing: 1964-07-17
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Granted: 1965-11-30
•
Expires: 1984-07-17
Abstract
No abstract record available.
Inventors
- 👤 Towne Arnold Phillip
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:23
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/12
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
142 words
AN ACOUSTICAL APPARATUS FOR TESTING THE HEARING OF A HUMAN SUBJECT COMPRISING A MEANS FOR PRODUCING AN ORIGINAL SOUND SEQUENCE HAVING A PREDETERMINED IDENTIFIABLE CHARACTER IN ITS ENTIRETY, MEANS FOR PRODUCING FIRST AND SECOND MODIFIED SOUND SEQUENCE, SAID FIRST AND SECOND MODIFIED SOUND SEQUENCES COMPRISING THE ORIGINAL SOUND SEQUENCE WITH PORTIONS REMOVED THEREFROM TO PROVIDE IMPOSED HIATUSES TO OBSCURE THE ORIGINAL IDENTIFIABLE CHARACTER OF EACH SAID FIRST AND SECOND MODIFIED SEQUENCES, SAID MODIDIFED SEQUENCES HAVING IMPOSED HIATUSES DISPOSED AT INTERVALS SO AS TO AVOID COINCIDENCE OF ANY HITAUS OF ONE OF SAID MODIFIED SOUND SEQUENCES WITH ANY PART OF ANY IMPOSED HIATUS IN THE OTHER MODIFIED SOUND SEQUENCE, AND MEANS FOR SIMULTANEOUSLY TRANSMITTING SAID FIRST MODIFIED SOUND SEQUENCE TO ONLY ONE EAR OF A HEARING TEST SUBJECT AND TRANSMITTING SAID SECOND MODIFIED SOUND SEQUENCE TO ONLY THE OTHER EAR OF SAID SUBJECT.
References Cited (Backward Citations)
US2114680A
Cited
US2558853A
Cited
US2911482A
Cited
US2792449A
Cited
US2869666A
Cited
US2768237A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-29 | 1969-05-31 | 1969-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-29 | 1973-05-31 | 1973-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-29 | 1977-05-31 | 1977-11-30 | $7700.00 | Window Closed / Lapsed |