Patent US3513303A successfully refreshed from Google Patents.
US3513303A
Expired / Lapsed
US
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Desk calculator for performing addition,subtraction,multiplication and division
Assignee: Bell Punch Co Ltd
•
Filing: 1965-03-22
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Granted: 1970-05-19
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Expires: 1985-03-22
Abstract
No abstract record available.
Inventors
- 👤 Norbert Kitz
- 👤 John G Lloyd
- 👤 James J Drage
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:00
CPC Classifications
G; G06; G06F; G06F7/00; G06F7/38; G06F7/48; G06F7/491; G06F7/4912; G06F15/00; G06F15/02; G06F3/00; G06F3/01; G06F3/02; G06F3/14; G06F3/1407; G06F7/498; G06F7/4981; G06F7/4983; G06F7/4985; G06F2207/00; G06F2207/491; G06F2207/49195
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2575331A
Cited
US2512851A
Cited
US2954167A
Cited
US2955757A
Cited
US2961160A
Cited
US3034721A
Cited
US3280315A
Cited
US3047227A
Cited
US3036775A
Cited
US3239654A
Cited
US3296425A
Cited
US3258583A
Cited
US3253132A
Cited
US3281794A
Cited
US3308280A
Cited
US3308281A
Cited
US3294960A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-18 | 1973-11-17 | 1974-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-18 | 1977-11-17 | 1978-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-18 | 1981-11-17 | 1982-05-19 | $7700.00 | Window Closed / Lapsed |