Patent US4384858A successfully refreshed from Google Patents.
Patent US3606538A successfully refreshed from Google Patents.
US3606538A
Expired / Lapsed
US
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Stereoscopic viewing system
Assignee: Jenoptik AG
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Filing: 1969-04-25
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Granted: 1971-09-20
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Expires: 1989-04-25
Abstract
Abstract A SYSTEM FOR STEREOSCOPIC OBSERVATION OF A PAIR OF IMAGES OF AN OBJECT INCLUDES AT LEAST ONE STEREOSCOPIC MARK. ACCURACY OF STEREOSCOPIC MEASUREMENT IS INCREASED BY PERIODICAL RELATIVE MOTION OF THE OBJECT OR THE PAIR OF IMAGES ON THE ONE HAND AND THE STEREOSCOPIC MARK ON THE OTHER. THE FREQUENCY F AND THE AMPLITUDE A OF THE RELATIVE MOTION ARE RESPECTIVELY 10-$F$50 MIN.-1 AND $ BEING THE MEAN WIDTH REVOLVING POWER OF THE HUMAN EYE, AND 1'', THE ANGULAR MANIFICATION OF THE OBSERVATION SYSTEM.
Inventors
- 👤 Siegfried Hesse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:33
CPC Classifications
G; G02; G02B; G02B30/00; G02B30/20; G02B30/34; G02B30/36; G02B30/35
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |