...In 1790, the cost to obtain a patent was between $4 and $5.
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 6856469 | Lens driving device A lens driving device includes a moving body equipped with a lens and a driving magnet attached to the lens, and a fixed body that is equipped with a driving coil that forms together with the driving magnet a magnetic circuit and moves the moving body in an optical ... | 02/15/2005 |
| 6847428 | Camera having a liquid crystal display device A liquid crystal display panel in which a signal electrode provided on a first substrate (1), a counter electrode provided on a second substrate (2), and a liquid crystal layer (18) between the substrates, and which carries out display without p... | 01/25/2005 |
| 5155522 | Self centering bi-directional electromagnetic actuator A system for electromagnetically activating the shutter of a camera to provide different aperture openings by providing: an armature comprising a core and a coil, the core is capable of receiving current and the armature will produce a first magnetic fiel... | 10/13/1992 |
| 4200372 | Automatic aperture presetting and exposure control device for camera In the disclosed automatic exposure control device for a motion picture camera and so on, a diaphragm driving arrangement drives a diaphragm arrangement. An exposure control arrangement having a light sensing element for sensing scene light and producing ... | 04/29/1980 |
| 4184757 | Exposure servo-control device for cameras An exposure servo-control device for a camera prevents diaphragm overshoot by a simple damping construction including a mechanical switch or a semiconductor switching element which intermittently short-circuits a driving coil of an ammeter coupled to the ... | 01/22/1980 |
| 4118717 | Automatic film-exposure control system and electrical power supply means for a photographic camera The "f" stop of a camera having a fixed shutter speed is automatically set by a galvanometer type control component that is energized by a mechanically powered electric generator which constitutes an integral part of the camera. The shutter is tripped in ... | 10/03/1978 |