Patent US3510967A successfully refreshed from Google Patents.
US3510967A
Expired / Lapsed
US
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Apparatus for reading braille
Assignee: MILDRED P GATES
•
Filing: 1968-09-09
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Granted: 1970-05-12
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Expires: 1988-09-09
Abstract
No abstract record available.
Inventors
- 👤 William H King
- 👤 Keith L Wallace
- 👤 Robert A Bruce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:21
CPC Classifications
G; G09; G09B; G09B21/00; G09B21/001; G09B21/003; G06; G06K; G06K7/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2521338A
Cited
US2981324A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-11 | 1973-11-10 | 1974-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-11 | 1977-11-10 | 1978-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-11 | 1981-11-10 | 1982-05-12 | $7700.00 | Window Closed / Lapsed |