Patent US3620151A successfully refreshed from Google Patents.
US3620151A
Expired / Lapsed
US
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Aperture controlling device in flash photography
Assignee: Hattori Tokeiten KK
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Filing: 1968-12-30
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Granted: 1971-11-16
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Expires: 1988-12-30
Abstract
Abstract APPARATUS FOR ADJUSTING THE EXPOSURE APERTURE FOR A CAMERA IN CONJUNCTION WITH THE FLASH OPERATION THEREOF, THE APPARATUS INCLUDING A MANUALLY OPERATED DEVICE AND A CONTROL LEVEL RESPONSIVE THERETO, A MOVABLE LEVEL RESPONSIVE TO THE FOCUSING MECHANISM AND AN EXPOSURE APERTURE ADJUSTING MEMBER. THE EXPOSURE APERTURE ADJUSTING MEMBER IS MOVED AUTOMATICALLY TO ADJUST THE EXPOSURE APERTURE TO THE PROPER VALUE FOR TAKING A PICTURE UTILIZING ASSOCIATED FLASH EQUIPMENT IN RESPONSE TO THE GUIDE NUMBER SET BY THE GUIDE NUMBER SETTING DEVICE AND THE DISTANCE VALUE SET BY THE FOCUSING MECHANISM.
Inventors
- 👤 Kiyoshi Kitai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:08
CPC Classifications
G; G03; G03B; G03B7/00; G03B7/16
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) | 1974-11-15 | 1975-05-17 | 1975-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-15 | 1979-05-17 | 1979-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-15 | 1983-05-17 | 1983-11-16 | $7700.00 | Window Closed / Lapsed |