Camera having checking function
Patent 4903056 Issued on February 20, 1990. Estimated Expiration Date: 
November 23, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
November 23, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3883883 Electronic image pick-up device for a single-lens reflex camera having an interchangeable finder Video finder for single-lens reflex camera Method for previewing undeveloped film Patent #: 4716470 InventorsApplicationNo. 276165 filed on 11/23/1988US Classes:396/374ElectronicExaminersPrimary: Adams, Russell E.Attorney, Agent or FirmInternational ClassG03B 029/00Foreign Application Priority Data1987-11-24 JPAbstractA camera having checking function in which part of a light beam passing through the conjugate system of the camera lens unit is taken out. The light beam taken is passed through a focusing optical system to focus an optical image on an imaging device, and the imaging device outputs a picture signal corresponding to the optical image focused. | |
