Patent EP0682901A1 successfully refreshed from Google Patents.
US3721164A
Expired / Lapsed
US
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Photoelectric device for recording symbols and for drawing small diagrams at high recording and drawing speed for use in an automatic drafting machine
Assignee: CORADI G AG
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Filing: 1971-11-30
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Granted: 1973-03-20
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Expires: 1991-11-30
Abstract
Abstract A VIRTUALLY INERTIALESS AUTOMATIC DRAFTING MACHINE FOR RECORDING SYMBOLS AND DIAGRAMS, AT HIGH RECORDING SPEEDS, ON A PHOTOGRAPHIC LAYER. AN ADJUSTABLE ILLUMINATING SYSTEM PRODUCES AN IMAGE OF A LINE-THICKNESS-DETERMINING APERTURE, THE IMAGE BEING DIRECTED TO A PAIR OF ROTATABLE MIRRORS SO THAT IT IS DEFLECTED IN A DIRECTION OF ONE OR THE OTHER COORDINATES AND ONTO THE PHOTOGRAPHIC LAYER, THE MIRRORS BEING CONTROLLED BY SIGNALS SUPPLIED BY A STORAGE MEDIUM.
Inventors
- 👤 K Blattner
- 👤 R Picard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:35
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/20; G02; G02B; G02B27/00; G02B27/64; G02B27/642; G06; G06K; G06K15/00; G06K15/22; G06K15/225; H; H04; H04N; H04N1/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-19 | 1976-09-18 | 1977-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-19 | 1980-09-18 | 1981-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-19 | 1984-09-18 | 1985-03-20 | $7700.00 | Window Closed / Lapsed |