US3274912A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single-lens reflex camera
Assignee: Konica Minolta Inc
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Filing: 1962-02-27
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Granted: 1966-09-27
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Expires: 1982-02-27
Abstract
No abstract record available.
Inventors
- 👤 Kasahara Tadashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:50
CPC Classifications
G; G03; G03B; G03B13/00; G03B13/18; G03B13/24; G03B13/26; G03B19/00; G03B19/02; G03B19/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
184 words
A SINGLE LENS REFLEX CAMERA COMPRISING A PHOTOGRAPHIC OBJECTIVE HAVING A LARGE ANGLE FIELD OF VISION, A DIAPHRAGM IN FRONT OF SAID OBJECTIVE, TWO SMALL REFLECTORS IN FRONT OF SAID DIAPHRAGM AND SPACED FROM THE OPTICAL AXIS OF SAID CAMERA, AND AN OPTICAL FINDER SYSTEM ADJACENT SAID OBJECTICE AND DIAPHRAGM INTO WHICH SAID REFLECTORS REFLECT A PORTION OF THE LIGHT ENTERING THE CAMERA, SAID OPTICAL FINDER SYSTEM HAVING A FOCUSING PANEL IN THE REAL IMAGE PLANE OF SAID FINDER SYSTEM WITH TWO FLAT SURFACES ON THE SIDE THEREOF ONTO WHICH THE LIGHT FROM THE REFLECTORS IN INCIDENT AND HAVING THE OTHER SIDE SPHERICAL, SAID FLAT SURFACES EACH BEING INCLINED AT AN ANGLE TO THE OPTICAL AXIS OF SAID FINDER SYSTEM AND TO EACH OTHER AT AN ANGLE DETERMINED BY THE POSITION OF TWO SMALL REFLECTORD, EACH SURFACE HAVING AN EXTENSION EXTENDING INTO THE OTHER INCLINED SURFACE PAST A LINE OF INTERSECTIONS OF SAID SURFACES, SAID EXTENSIONS HAVING THE EDGES THEREOF WHICH ARE ADJACENT STRAIGHT AND LYING IN A PLANE WHICH INCLUDES THE OPTICAL AXIS OF SAID FINDER SYSTEM AND IS PERPENDICULAR TO SAID SURFACES.
Claim 2
Dependent Claim
184 words
A SINGLE LENS REFLEX CAMERA COMPRISING A PHOTOGRAPHIC OBJECTIVE HAVING A LARGE ANGLE FIELD OF VISION, A DIAPHRAGM IN FRONT OF SAID OBJECTIVE, TWO SMALL REFLECTORS IN FRONT OF SAID DIAPHRAGM AND SPACED FROM THE OPTICAL AXIS OF SAID CAMERA, AND AN OPTICAL FINDER SYSTEM ADJACENT SAID OBJECTICE AND DIAPHRAGM INTO WHICH SAID REFLECTORS REFLECT A PORTION OF THE LIGHT ENTERING THE CAMERA, SAID OPTICAL FINDER SYSTEM HAVING A FOCUSING PANEL IN THE REAL IMAGE PLANE OF SAID FINDER SYSTEM WITH TWO FLAT SURFACES ON THE SIDE THEREOF ONTO WHICH THE LIGHT FROM THE REFLECTORS IN INCIDENT AND HAVING THE OTHER SIDE SPHERICAL, SAID FLAT SURFACES EACH BEING INCLINED AT AN ANGLE TO THE OPTICAL AXIS OF SAID FINDER SYSTEM AND TO EACH OTHER AT AN ANGLE DETERMINED BY THE POSITION OF TWO SMALL REFLECTORD, EACH SURFACE HAVING AN EXTENSION EXTENDING INTO THE OTHER INCLINED SURFACE PAST A LINE OF INTERSECTIONS OF SAID SURFACES, SAID EXTENSIONS HAVING THE EDGES THEREOF WHICH ARE ADJACENT STRAIGHT AND LYING IN A PLANE WHICH INCLUDES THE OPTICAL AXIS OF SAID FINDER SYSTEM AND IS PERPENDICULAR TO SAID SURFACES.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-26 | 1970-03-28 | 1970-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-26 | 1974-03-28 | 1974-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-26 | 1978-03-28 | 1978-09-27 | $7700.00 | Window Closed / Lapsed |