The first match was accidentally discovered in 1826 when John Walker scraped a stick with chemicals on the end against a stone floor.
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 |
| 5003340 | Exposure control with reduced shutter speed for tele/pan camera A tele/pan camera is provided with automatic means cooperating with exposure control circuitry to reduce blur in a portion of an exposed frame coded for subsequent pseudo format enlargement, for increasing the normal shutter speed, with corresponding adju... | 03/26/1991 |
| 4994830 | Tele pan camera data back shifts and reduces printed data with changes in mode Data printing device for a camera which takes normal and pseudo type images wherein the characters are printed near an edge of the selected image area in both the normal and pseudo modes, optionally with reduction in character size in the pseudo mode.... | 02/19/1991 |
| 4982213 | Camera and printing apparatus with variable trimming magnification A camera capable of setting trimming magnification is provided with: a print size input unit for entering the print size of a photograph; a magnification input unit for entering a desired trimming magnification; a determination unit for determining the maximum trimming ... | 01/01/1991 |
| 4967214 | Camera on which a front converter can be mounted A camera on which a front converter can be mounted and wherein a picture image of a high quality over an entire picture plane can be obtained and an aperture of a front converter can be reduced while a photographing magnification of the camera can be incr... | 10/30/1990 |
| 4963907 | Photographic camera A photographic camera wherein photographing mode selecting circuit is provided to select a real focal length photographing mode and a pseudo focal length photographing mode for making a print of a field narrower than the field defined by the real focal le... | 10/16/1990 |
| 4963917 | Photographic camera A photographic camera system including a mode setting device for selectively setting the system to a real focal length photographing mode for printing an ordinary photographic zone and a pseudo focal length photographing mode for printing a zone narrower ... | 10/16/1990 |
| 4949110 | Photographic camera A photographic camera having a real focal length photographing mode and two kinds of a first and a second pseudo focal length photographing modes. In the first pseudo focal length photographing mode, the photographic camera is capable of specifying a scop... | 08/14/1990 |
| 4943825 | Photographic camera The photographic camera which prints a code signal representing printing information on a film is capable of selecting a real focal length photographing mode for printing a normal range of a frame, a plurality of pseudo focal length photographing mode eac... | 07/24/1990 |
| 4929971 | Camera and image output apparatus capable of trimmed photographing A camera and an image output apparatus is capable of trimmed photographing. The camera is provided with detection means for detecting parallax information for specifying the difference between the photographing field and the viewing finder field based on ... | 05/29/1990 |
| 4928124 | Photographic camera A changeable focal length photographic camera which may operate in either a real focal length photographing mode or a pseudo focal length photographing mode. A light shielding device shields a portion of the film to be exposed when the pseudo focal length... | 05/22/1990 |
| 4926203 | Pseudo format camera with light shielding means A photographic camera system including a mode setting device for selectively setting the system to a real focal length photographing mode for printing an ordinary photographic zone and a pseudo focal length photographing mode for printing a zone narrower ... | 05/15/1990 |
| 4924248 | Photographic camera A changeable focal length photographic camera which may operate in either a real focal length photographing mode or a pseudo focal length photographing mode. Either a normal focal length photographing mode or a close-up photographing mode may be selected.... | 05/08/1990 |
| 4908650 | Waterproof camera The disclosure relates to a waterproof camera which comprises a switching member for selecting a real focal length photographing mode and a pseudo focal length photographing mode, a recording member for recording a code denoting the pseudo focal length ph... | 03/13/1990 |
| 4887108 | Photographic camera A photographic camera having a real focal length photographing mode and two kinds of a first and a second pseudo focal length photographing modes. In the first pseudo focal length photographing mode, the photographic camera is capable of specifying a scop... | 12/12/1989 |
| 4884089 | Pseudo format camera A photographic camera capable of selecting a real focal length photographic mode for printing a normal range of a frame of film and a plurality of pseudo focal length photographic modes, each being different in pseudo focal length from each other, for pri... | 11/28/1989 |
| 4862201 | Photographic camera A photographic camera system including a mode setting device for selectively setting the system to a real focal length photographing mode for printing an ordinary photographic zone and a pseudo focal length photographing mode for printing a zone narrower ... | 08/29/1989 |
| 4855780 | Photometric device for pseudo format camera A photometric device for a pseudo format camera capable of performing trimming photography includes, a trimming data setting unit which sets trimming data. A light-receiving unit consists of a plurality of light-receiving portions for splitting an objecti... | 08/08/1989 |
| 4847646 | Camera accessory A camera accessory is provided which allows a camera to photograph in a pseudo focal length photographing mode. In the pseudo focal length photographing mode, a portion of an image recorded onto a film is reproduced on a print with larger enlargement than... | 07/11/1989 |
| 4843418 | Photographic camera The photographic camera which prints a code signal representing printing information on a film is capable of selecting a real focal length photographing mode for printing a normal range of a frame, a plurality of pseudo focal length photographing mode eac... | 06/27/1989 |
| 4829333 | Photographic camera A photographic camera wherein photographing mode selecting circuit is provided to select a real focal length photographing mode and a pseudo focal length photographing mode for making a print of a field narrower than the field defined by the real focal le... | 05/09/1989 |
| 4814804 | Photographic camera A camera having, in addition to a real focal length photographing mode, a pseudo focal length photographing mode, namely, a photographing mode in which a part of a photographed image frame of a film is printed at an enlarging ratio different from an ordin... | 03/21/1989 |
| 4812871 | Photographic camera The photographic camera which prints a code signal representing printing information on a film is capable of selecting a real focal length photographing mode for printing a normal range of a frame a, plurality of pseudo focal length photographing mode eac... | 03/14/1989 |
| 4780735 | Photographic camera The photographic camera which prints a code signal representing printing information on a film is capable of selecting a real focal length photographing mode for printing a normal range of a frame, a plurality of pseudo focal length photographing mode eac... | 10/25/1988 |
| 4774536 | Photographic camera A photographic camera wherein photographing mode selecting circuit is provided to select a real focal length photographing mode and a pseudo focal length photographing mode for making a print of a field narrower than the field defined by the real focal le... | 09/27/1988 |
| 4768047 | Photographic camera A photographic camera having a real focal length photographing mode and two kinds of a first and a second pseudo focal length photographing modes. In the first pseudo focal length photographing mode, the photographic camera is capable of specifying a scop... | 08/30/1988 |
| 4733263 | Photographic camera A camera having, in addition to a real focal length photographing mode, a pseudo focal length photographing mode, namely, a photographing mode in which a part of a photographed image frame of a film is printed at an enlarging ratio different from an ordin... | 03/22/1988 |
| 4728973 | Camera on which a front converter can be mounted A camera on which a front converter can be mounted and wherein a picture image of a high quality over an entire picture plane can be obtained and an aperture of a front converter can be reduced while a photographing magnification of the camera can be incr... | 03/01/1988 |
| 4650304 | Pseudo format camera and special film cartridge A photographic camera is adapted to receive a conventional film cartridge for taking exposures for use in producing normal prints and a special film cartridge for taking exposures for use in producing pseudo telephoto or pseudo panoramic prints made by en... | 03/17/1987 |
| 4639111 | Pseudo format camera with exposure control A photographic camera enables pseudo telephoto and pseudo panoramic prints to be produced from exposed film frames by coding the film frame to identify the selected pseudo format. In the camera, a manually operated member is movable to a position correspo... | 01/27/1987 |
| 4583831 | Pseudo telephoto--pseudo panoramic camera A photographic camera enables pseudo telephoto and pseudo panoramic prints to be obtained from normal exposures coded to identify the selected type print. In the camera, an objective lens is adjustable to vary its angular field of view within a field rang... | 04/22/1986 |