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US2641886A
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US
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Winged wheeled harrow
Assignee: Individual
•
Filing: 1947-10-18
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Granted: 1953-06-16
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Expires: 1967-10-18
Abstract
No abstract record available.
Inventors
- 👤 William T Graham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:05
CPC Classifications
A; A01; A01B; A01B23/00; A01B23/04; A01B23/043; A01B73/00; A01B73/02; A01B73/04; A01B73/044
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US971591A
Cited
US1008915A
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US1404544A
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US1497781A
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US1563261A
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US1844560A
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US1938132A
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US2029249A
Cited
US2298161A
Cited
US2493811A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-15 | 1956-12-15 | 1957-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-15 | 1960-12-15 | 1961-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-15 | 1964-12-15 | 1965-06-16 | $7700.00 | Window Closed / Lapsed |