US3422537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Computing perspective drafting machine
Assignee: PERSPECTIVE Inc
•
Filing: 1965-05-19
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Granted: 1969-01-21
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Expires: 1985-05-19
Abstract
No abstract record available.
Inventors
- 👤 Donald E Dewey
- 👤 Charles H Hartman
- 👤 Robert D Horn
- 👤 Talmadge O Mccartney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:08
CPC Classifications
B; B43; B43L; B43L13/00; B43L13/02; B43L13/022
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A DRAFTING MACHINE, SAID MACHINE COMPRISING: (A) A TRACING BOARD ON WHICH A SOURCE DRAWING VIEW CAN BE MOUNTED (B) AN UPRIGHT DRAWING BOARD ABOVE ABOVE TRACING (C) MEANS MOUNTING SAID DRAWING BOARD FOR MOVEMENT ACROSS SAID TRACING BOARD; (D) DRAWING MEANS MOVABLE OVER SAID DRAWING BOARD; (E) DRIVE MEANS MOVABLE OVER SAID DRAWING BOARD; SAID DRAWINGS MEANS; (F) TRACING MEANS MOVABLE OVER SAID TRACING BOARD; AND (G) COMPUTER MEANS OPERABLE IN RESPONSE TO MOVEMENT OF SAID TRACING MEANS OVER SAID TRACING BOARD TO EFFECT MOVEMENT OF SAID DRIVE MEANS FOR MOVING SAID DRAWING MEANS OVER SAID DRAWING BOARD.
Claim 2
Dependent Claim
99 words
A DRAFTING MACHINE, SAID MACHINE COMPRISING: (A) A TRACING BOARD ON WHICH A SOURCE DRAWING VIEW CAN BE MOUNTED (B) AN UPRIGHT DRAWING BOARD ABOVE ABOVE TRACING (C) MEANS MOUNTING SAID DRAWING BOARD FOR MOVEMENT ACROSS SAID TRACING BOARD; (D) DRAWING MEANS MOVABLE OVER SAID DRAWING BOARD; (E) DRIVE MEANS MOVABLE OVER SAID DRAWING BOARD; SAID DRAWINGS MEANS; (F) TRACING MEANS MOVABLE OVER SAID TRACING BOARD; AND (G) COMPUTER MEANS OPERABLE IN RESPONSE TO MOVEMENT OF SAID TRACING MEANS OVER SAID TRACING BOARD TO EFFECT MOVEMENT OF SAID DRIVE MEANS FOR MOVING SAID DRAWING MEANS OVER SAID DRAWING BOARD.
References Cited (Backward Citations)
US2714253A
Cited
GB741554A
Cited
US2924768A
Cited
US2999317A
Cited
US3059236A
Cited
US3024396A
Cited
US3019072A
Cited
US3182399A
Cited
US3217220A
Cited
US3145474A
Cited
US3178717A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-21 | 1972-07-22 | 1973-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-21 | 1976-07-22 | 1977-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-21 | 1980-07-22 | 1981-01-21 | $7700.00 | Window Closed / Lapsed |