US3321737A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sonar-type sensory aids
Assignee: Individual
•
Filing: 1965-02-03
•
Granted: 1967-05-23
•
Expires: 1985-02-03
Abstract
No abstract record available.
Inventors
- 👤 Russell Lindsay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:27
CPC Classifications
G; G01; G01S; G01S1/00; G01S1/72; Y; Y10; Y10S; Y10S367/00; Y10S367/91
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
170 words
THE METHOD OF SENSING OBJECTS FOR GUIDANCE OF A BLIND PERSON COMPRISING THE STEPS OF PRODUCING BURSTS OF SUPERSONIC SIGNALS AT A REPETITION RATE OF MANY TIMES PER SECOND AND PROPAGATING SAID BURSTS IN A DIRECTIONL BEAM SUBSTANTIALLY HORIZONTALLY AND FORWARDLY FROM IN FRONT OF A BLIND PERSON AT ABOUT CHEST HEIGHT, RECEIVING THE SUPERSONIC SIGNALS REFLECTED FROM OBJECTS WITHIN THE BEAM AND PRODUCING ELECTRICAL PULSE RELATED THERETO, PRODUCING A FIRST AUDIBLE ALARM SIGNAL FOR A PERIOD LESS THAN THE REMAINING INTERVAL BEFORE TRANSMISSION OF THE NEXT-SUCCEEDING BURST OF SUPERSONIC SIGNALS WHENEVER AN ELECTRICAL PULSE IS PRODUCED WITHIN A FIRST PREDETERMINED RELATIVELY SUSTAINED INTERVAL FOLLOWING TRANSMISSION OF A BURST OF THE SUPERSONIC SIGNALS, AND PRODUCING AT LEAST A SECOND DISTINCTIVE AUDIBLE OUTPUT SIGNAL FOR A PERIOD LESS THAN THE REMAINING INTERVAL BEFORE TRANSMISSION OF THE NEXT-SUCCEEDING BURST OF SUPERSONIC SIGNALS WHENEVER AN ELECTRICAL PULSE IS PRODUCED WITHIN AT LEAST A SECOND PREDETERMINED RELATIVELY SUSTAINED INTERVAL FOLLOWING SAID FIRST PREDETERMINED INTERVAL AND BEFORE TRANSMISSION OF THE NEXT-SUCCEEDING BURST OF SUPERSONIC SIGNALS.
Claim 2
Independent Claim
170 words
THE METHOD OF SENSING OBJECTS FOR GUIDANCE OF A BLIND PERSON COMPRISING THE STEPS OF PRODUCING BURSTS OF SUPERSONIC SIGNALS AT A REPETITION RATE OF MANY TIMES PER SECOND AND PROPAGATING SAID BURSTS IN A DIRECTIONL BEAM SUBSTANTIALLY HORIZONTALLY AND FORWARDLY FROM IN FRONT OF A BLIND PERSON AT ABOUT CHEST HEIGHT, RECEIVING THE SUPERSONIC SIGNALS REFLECTED FROM OBJECTS WITHIN THE BEAM AND PRODUCING ELECTRICAL PULSE RELATED THERETO, PRODUCING A FIRST AUDIBLE ALARM SIGNAL FOR A PERIOD LESS THAN THE REMAINING INTERVAL BEFORE TRANSMISSION OF THE NEXT-SUCCEEDING BURST OF SUPERSONIC SIGNALS WHENEVER AN ELECTRICAL PULSE IS PRODUCED WITHIN A FIRST PREDETERMINED RELATIVELY SUSTAINED INTERVAL FOLLOWING TRANSMISSION OF A BURST OF THE SUPERSONIC SIGNALS, AND PRODUCING AT LEAST A SECOND DISTINCTIVE AUDIBLE OUTPUT SIGNAL FOR A PERIOD LESS THAN THE REMAINING INTERVAL BEFORE TRANSMISSION OF THE NEXT-SUCCEEDING BURST OF SUPERSONIC SIGNALS WHENEVER AN ELECTRICAL PULSE IS PRODUCED WITHIN AT LEAST A SECOND PREDETERMINED RELATIVELY SUSTAINED INTERVAL FOLLOWING SAID FIRST PREDETERMINED INTERVAL AND BEFORE TRANSMISSION OF THE NEXT-SUCCEEDING BURST OF SUPERSONIC SIGNALS.
References Cited (Backward Citations)
US3125754A
Cited
US2560587A
Cited
US2500638A
Cited
US2541944A
Cited
US2998591A
Cited
US3087151A
Cited
FR1296625A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-05-22 | 1970-11-21 | 1971-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-22 | 1974-11-21 | 1975-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-22 | 1978-11-21 | 1979-05-23 | $7700.00 | Window Closed / Lapsed |