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...that after Walter Hunt patented the safety pin in 1849, he sold the rights to it for $400?
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| Number | Title | Issue Date |
| 8007187 | Single lens reflex camera with electro-optical reflex apparatus A lens-interchangeable single-lens reflex camera system according to the present invention employs a novel reflex apparatus comprising stationary “smart glass” elements. The “smart glass” elements switch between transparent and non-transparent states in resp... | 08/30/2011 |
| 6690581 | Connection structure of flexible board arranged in camera The connection structure of flexible boards permits efficient positioning and connecting of a plurality of flexible boards arranged one over the other in a camera by providing a pair of pin elements in a protruding condition in a base portion and forming ... | 02/10/2004 |
| 6678345 | Reactor pressure vessel and process for temperature equalization in a reactor pressure vessel A reactor pressure vessel with an upper support plate, in which an equalization opening is provided as a bypass is described. A process for temperature equalization between an upper dome chamber above a support plate and a lower chamber below it is descri... | 01/13/2004 |
| 6607310 | Shutter for a photographic camera A shutter for a photographic camera, having a first and a second pretensioned shutter curtain which are respectively retained in the tensioned state by a first and a second pivotably mounted retaining latch (7, 11) in interaction with a first and second c... | 08/19/2003 |
| 6278556 | Prism optical system The invention provides a prism optical system which has an image-forming action and provides a clear yet substantially undistorted image at a wide field angle. In a prism optical system 5 comprising an aperture 1 and having an action on erecting an image ... | 08/21/2001 |
| 6208468 | Image-forming optical system and apparatus using the same A distortion-free and compact image-forming optical system with a minimal number of optical components which provides a wide image area and which is favorably corrected for ray aberrations and arranged in a compact structure by folding an optical path. A ... | 03/27/2001 |
| 6157483 | Binocular with low magnification and wide field of vision The invention aims to provide binoculars suitable to be used in a theater or a sports stadium, which can provide a wide and bright field of view on one hand, and which are compact and lightweight with improved portability and maneuverability on the other ... | 12/05/2000 |
| 6101334 | Dual focal length camera Compact dual focal length cameras are disclosed having wide angle and telephoto modes of operation. The ratio of telephoto to wide angle ratios is at least 3 to 1, but is typically higher so that the cameras can be used in conjunction with binoculars to t... | 08/08/2000 |
| 5960218 | Dual focal length camera Compact dual focal length cameras are disclosed having wide angle and telephoto modes of operation. The ratio of telephoto to wide angle ratios is at least 3 to 1, but is typically higher so that the cameras can be used in conjunction with binoculars to t... | 09/28/1999 |
| 5721973 | Dual-focus change-over camera The dual-focus change-over camera provides a camera which allows telescope or wide angle photographing with a simple arrangement, and which is inexpensive, small size, and light weighted. The camera comprises a finder change-over member arranged to be mov... | 02/24/1998 |
| 5253005 | Small-sized camera A small-sized camera in which while the light emerging from a photographic lens having an optical axis parallel with a photosensitive plane is conducted by first and second mirrors to the photosensitive plane to form a photographic system, the first or se... | 10/12/1993 |
| 5247322 | Dual film single lens reflex camera A camera housing having a photographic lens set extending through one side allowing light to enter a camera interior along a light axis, a first film structure, a second film structure and a viewfinder system formed in the remaining sides of the camera ho... | 09/21/1993 |
| 4655571 | Telephoto lens camera A telephoto lens having a long focal distance is disposed at an upper location at the side portion of a camera body, and the light passed therethrough is reflected sidewardly of the camera body by a pivotable first mirror. Disposed at an upper location of... | 04/07/1987 |
| 4588275 | Photographic apparatus A photographic camera of the single lens reflex type having a reflex member pivotable between an exposure position and a viewing position there being provided as a part cooperating with the reflex member, a dark slide for covering an exposure plane before... | 05/13/1986 |
| 4420231 | Motion picture camera Motion picture camera apparatus uses a 35 mm prime lens assembly for a 16 mm motion picture camera. Between the prime lens assembly and the motion picture camera there is positioned a pair of fixed parallel mirrors mounted at an angle to the axis of the p... | 12/13/1983 |
| 4176934 | Arrangement of a photographic camera A photographic camera comprises two deviating mirrors arranged within the camera housing between the objective and the film strip in such a manner that the optical axis of the light rays between the objective and the assigned first mirror lies on a differ... | 12/04/1979 |
| 4109263 | Compact prism camera A compact, rigid camera has a folded optical path between an objective lens and a film plane and formed at least in part with a prism element having an entrance face, an exit face overlying and closely spaced from the film plane, and a reflective face. Th... | 08/22/1978 |
| 4047206 | Single lens reflex camera A single lens reflex camera system includes multiple replaceable mirrors, each designed to accomplish a specified function for different conditions of photography.... | 09/06/1977 |
| 4000499 | Galvano-magnetic effect control system for photographic apparatus An exposure control system is provided for a photographic apparatus in order to selectively actuate drive means including a tractive electro-magnetic means together with other instrumentality means to perform various functions in a predetermined order in ... | 12/28/1976 |
| 3936847 | Shaft drive and control system for automatic camera A shaft drive and control system for an automatic camera having a plurality of shaft driven devices operable in a photographic cycle at different times and at different speeds, in which the camera has a film pack receiving well, and comprising an electric... | 02/03/1976 |
