Famous Patents
3M employee and church chorister Art Fry needed something to temporarily mark pages in his hymnal. He was in luck because his colleague, Spencer Silver, accidentally developed a glue that was too weak for other purposes. After initially discouraging consumer response, Post-it Notes became a hit in 1979.
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| Number | Title | Issue Date |
| 6700685 | Image processing apparatus The image processing apparatus receives image data from an image data supply source and coverts the image date into output image data by subjecting the image data to image processing. The apparatus includes an instructing device for interactively instruct... | 03/02/2004 |
| 5856864 | Photographic printer and method of making a filter for a photographic printer A method of improving uneven illumination in a photographic printer having an original image position and a light source to illuminate the original image position, which light source may illuminate the original image position non-uniformly, the method com... | 01/05/1999 |
| 5760882 | Contact printer and method of making a filter for a contact printer A method of improving uneven illumination in a contact printer having an original image position and a light source to illuminate the original image position, which light source may illuminate the original image position non-uniformly, the method comprisi... | 06/02/1998 |
| 5659385 | Using paper negatives in digital imagesetting A process for making a printing plate includes composing a digital image of a page to be printed including at least one halftone image. Load imagesetting paper in an imagesetter. Operate the imagesetter to print a paper negative of the digital image on th... | 08/19/1997 |
| 5610687 | System and method for fade and dissolve exposure profile control in a motion picture printer Specially designed non-uniform filters allow for the flexible alteration of the exposure profile during a fade and dissolve process in a motion picture printer. In accordance with one aspect of this invention, there is provided a system for fading and dis... | 03/11/1997 |
| 5414490 | Photosensitive material exposure apparatus To provide a photosensitive material exposure apparatus which is easy for soft focusing exposure. A liquid crystal light regulation member 72 capable of holding light transmission and scattering functions reversibly is disposed between a light source 54 a... | 05/09/1995 |
| 5151336 | Masking material A masking material with a semiopaque layer containing a coloring agent, characterized in that the semiopaque layer permits the transmission of the light at a wavelength corresponding to the "green-lack" wavelength of color paper.... | 09/29/1992 |
| 5055871 | Method and apparatus for enhancing illumination uniformity in wafer steppers using photochromic glass in the optical path Enhanced uniformity of illumination is achieved in photolithography by interposing photochromic glass in the light path between the illuminator light source and a semiconductor wafer. In one embodiment of the invention, the photochromic glass is disposed ... | 10/08/1991 |
| 5023652 | Method and apparatus for photographic printing A photographic printing enlarger apparatus and method in which the enlarger head receives lights passing through a fiber optic light bundle. This light passes through a color filter system, negative, or transparency, supported by a negative carrier, and t... | 06/11/1991 |
| 4835576 | Opaquing method and apparatus thereof In the negative form of lith type film or photographic printing paper, the ground part is light-untransmissible and image part (letter, pattern) is light-transmissible. Apart from them, pinholes and stains also constitute light-transmissible areas. Althou... | 05/30/1989 |
| 4830468 | Liquid crystal print bar having a single backplane electrode A linear array of liquid crystal shutters mounted near a photoreceptor surface and arranged transversely to the direction of travel of the photoreceptor surface, an array of multiplexed thin film transistors (TFT's) connected to the array of liquid crysta... | 05/16/1989 |
| 4829339 | Film printing/reading system A photographic system for accurately reproducing encoded information onto a recording medium is disclosed. The system includes an image/light source, a feedback sensor, a lens assembly, a controller, a recording medium assembly and a reading sensor, where... | 05/09/1989 |
| 4814597 | Apparatus and method for enhancing radiographs and the like Method and apparatus for producing an enhanced radiographic image from a developed radiograph. The apparatus includes a support structure for supporting the radiograph in a stacked relationship with the radiographic film, a light source positioned in clos... | 03/21/1989 |
| 4682277 | Movable light source type exposure apparatus A movable light-source type exposure apparatus comprising a light source disposed at the focal point of a parabolic reflector, a first light-shielding member disposed right beneath the light source and intended to prevent the light rays from the light sou... | 07/21/1987 |
| 4448512 | Light means for exposing and light means for discharging in a electrophotographic printing machine An electrophotographic printing machine in which a light image exposing a non-uniform charge pattern formed on a photoconductive member is substantially attenuated to record a latent image thereon. Substantially unattenuated light rays discharge selected ... | 05/15/1984 |
| 4263001 | Apparatus and method for enhancement of optical images A method and apparatus used therein for modifying and enhancing the color, tonal range, highlight and shadow detail of an optical image, photograph, or photographic transparency in which the image to be enhanced is formed as a collection of small areas, c... | 04/21/1981 |
| 4043653 | Holographic high resolution contact printer A holograph high resolution contact printer for use in transferring high resolution information, which is in the form of a pattern on a transparency, from the transparency to the light-sensitive photoresist material front surface of a light-recording medi... | 08/23/1977 |
| 3984187 | Scanning and reproduction of pictorial images An original bears a pictorial image, or the like. The original is illuminated with first and second light and the image on the original is projected onto a copy carrier. The spatial variation of the intensity of the first light after the first light has b... | 10/05/1976 |
