Did You Know...
...Chester Carlson was a patent agent who tired of having to make multiple copies of patent applications using the only duplication method available at the time: carbon paper. In 1959 he came up with a new copying system and took it to IBM for evaluation. The "experts" at IBM determined potential sales to be only 5,000 units because people wouldn't want to use a bulky machine when they had carbon paper. Carlson's invention was the xerography process, the company founded on the system is Xerox.
PatentStorm News
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 |
| 7316514 | Light controller and image pickup device including the same A light controller includes a substrate that has an optical path opening; at least a pair of blades that is reciprocally supported on the substrate and opens and closes the optical path opening; and a driver unit that drives the opening and closing of the pair of bl... | 01/08/2008 |
| 6963368 | Digital camera and image capturing control apparatus including a delay device A digital camera includes: an image-capturing device that captures a subject image through a taking lens; a signal processing circuit that performs predetermined processing such as noise removal on an image-capturing signal output by the image-capturing device; a dr... | 11/08/2005 |
| 6347191 | Shutter control apparatus A shutter control apparatus is constructed for executing an exposure operation of a camera to photograph an object by controlling an actuator which drives a shutter blade to be opened and closed. In the shutter control apparatus, a battery supplies a powe... | 02/12/2002 |
| 5809315 | Electronic apparatus The present invention relates to an electronic apparatus which is arranged to drive a load by means of a microcomputer to which the boosted voltage obtained by boosting a battery output by boosting means is applied. The present invention also relates to a... | 09/15/1998 |
| 4362373 | Shutter control device for a camera having a shutter release lock device A shutter control device for a camera having an automatic exposure time control device provided with a comparator circuit for comparing a time output corresponding to the lapse of time from the opening operation of a shutter with a proper shutter speed ou... | 12/07/1982 |
| 4295718 | Exposure control circuit of camera An exposure control circuit for camera comprises a photoelectric transducer element which produces an integrated voltage by the photometry of light from an object being photographed. A trigger signal is applied to the transducer element by a trigger switc... | 10/20/1981 |
| 4272176 | Camera having an acoustic indicator for generating sounds to indicate the status of certain operating conditions A camera includes a circuit which determines the level of a supply voltage and a self-timer delay circuit associated with an electrical shutter. The camera also includes an acoustic indicator which includes a pulse oscillator and a small size acoustic ala... | 06/09/1981 |
| 4264162 | Drive system for electromagnetically driven shutter In the drive system disclosed, a first power source supplies a driving current to drive a moving member of an electromagnetic shutter driving device in one direction or in the reverse direction a second power source device consisting of a DC booster circu... | 04/28/1981 |
| 4190344 | Driving circuit for camera shutters A shutter driving circuit including a voltage judging circuit and indicating circuit in order to always properly make shutter opening and closing operations, whereby an electric current is prevented from flowing to driving coils and such state can be indi... | 02/26/1980 |
| 4187017 | Motor drive device in a camera In a motor drive device capable of being coupled to a camera having an automatic exposure control circuit for determining the aperture value and/or the shutter speed during exposure in accordance with the brightness of an object to be photographed, there ... | 02/05/1980 |
| 4126873 | Control circuit for the shutter holding magnet of a camera A shutter release circuit for a camera is disclosed having the capability of deenergizing the shutter holding magnet when the power source voltage drops below the value capable of sustaining normal operation of the photometric and operational circuit.... | 11/21/1978 |
| 4099195 | Camera having automatic and manual exposure-time determination A camera which is capable of automatically determining exposure time and which is also capable of providing for manual determination of exposure time either in a manual-mechanical range of exposure times or in a mechanical-electrical range of exposure tim... | 07/04/1978 |
| 4037237 | Exposure control apparatus An exposure control circuit that produces a variable exposure interval depending upon scene brightness or a constant exposure interval proportional to a predetermined scene brightness, by providing a photocurrent proportional to the level of actual scene ... | 07/19/1977 |
| 4003063 | Power supply regulator for an automatic exposure adjusting circuit for use in a camera An automatic exposure adjusting circuit for use in a camera which permits the power to be supplied to several groups of circuits having different operation initiating and terminating times, only during their respective operative intervals. The invention a... | 01/11/1977 |
| 3997904 | Camera circuit arrangement for the pre-indication of exposure time A circuit arrangement for the pre-indication of the exposure time to be expected in automatic mirror-reflex cameras in which the brightness of a controllable luminous element, which is constant for the duration of the exposure, is used for the illuminatio... | 12/14/1976 |
| 3990086 | Shutter control circuit for cameras A shutter control circuit for a camera including a timing circuit for measuring the exposure time during which the shutter will remain open. The shutter control circuit further includes a switching circuit having a switching transistor with a collector, c... | 11/02/1976 |
| 3978498 | Exposure time control circuit of shutter of a camera An exposure time control circuit for an electric shutter of a camera includes a monolithic IC having input circuitry in the form of a transistorized differential amplifier having two input terminals. A time-constant circuit develops a timing signal propor... | 08/31/1976 |
