Did You Know...
...that Thomas Edison's patent application on his phonograph was approved by the Patent Office in just seven weeks? In contrast, it took Gordon Gould, the inventor of the laser, 30 years to obtain his patent -- finally awarded in 1988!
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| Number | Title | Issue Date |
| 7361456 | Method of manufacturing master disk, apparatus of manufacturing master disk, method of detecting moving distance difference of master disk, and apparatus of detecting moving distance difference of master disk A method is provided for manufacturing a master disk in which there is precise feeding accuracy of the master disk by using a horizontally moving device which moves with curvature. The method of manufacturing a master disk includes the steps of rotating a resist mas... | 04/22/2008 |
| 7292319 | Optical tracking device employing a three-axis gimbal An optical tracking device, includes an azimuth sub-assembly providing a 360-degree range of motion and a transducer sensing the azimuth position within this range of motion; and an elevation sub-assembly coupled to the azimuth sub-assembly and providing at least a ... | 11/06/2007 |
| 7266880 | Method of making a monolithic magnetic read-while-write head apparatus A method for fabricating a multi-track thin-film magnetoresistive tape head with precisely-aligned read/write track-pairs fabricated on a monolithic substrate wafer is provided. The wafer is fabricated using modified standard thin-film processes for fabricating dire... | 09/11/2007 |
| 7115973 | Dual-sided semiconductor device with a resistive element that requires little silicon surface area A dual-sided semiconductor device is formed on a wafer with a resistive element that is formed through the wafer. By forming the resistive element through the wafer, a resistive element, such as a large resistive element, can be formed on the wafer that requires ver... | 10/03/2006 |
| 7109571 | Method of forming a hermetic seal for silicon die with metal feed through structure A semiconductor die is formed in a process that forms a trench opening in the semiconductor material prior to the formation of the contacts and the metal-1 layer. When contacts are then formed to contact circuit structures, such as a doped region in the top surface ... | 09/19/2006 |
| 7005388 | Method of forming through-the-wafer metal interconnect structures A semiconductor die is formed in a process that forms a hole through the wafer prior to the formation of the contacts and the metal-1 layer of an interconnect structure. The through-the-wafer hole is formed by using a wafer with a crystallographic orientation ... | 02/28/2006 |
| 5999252 | Method for marking workpieces A method for laser marking semiconductor wafers wherein marking errors attributable to the laser marking tool are measured for each of the anticipated marking fields. A weighted average error is then calculated, and a correction based thereon is entered i... | 12/07/1999 |
| 5118184 | Transit for establishing 90 degree angles A transit includes two identical transit elements oriented at 90° with respect to each other. Each transit element includes an objective end and a viewing end and be focused on a distant point. The transit is mounted on top of an intersection of two elem... | 06/02/1992 |
| 4991125 | Displacement detector An absolute position type of displacement detector employs multiple grating tracks. The pitches of the gratings in the respective tracks are set to be just slightly different so as to detect an absolute position from a small number of analog signals by a ... | 02/05/1991 |
| 4981354 | Optical differential tilt sensor An electrooptical sensor system directly measures the angle between two nearly parallel collimated laser beams. After focussing with a positive lens, the beams pass through a photoelastic modulator, a quarter wave retardation plate, and two polarizers. Th... | 01/01/1991 |
| 4972592 | Sextant with adjustable handle An optical measuring instrument permits the user to adapt the handle position optimally to his individual wishes and habits while holding the instrument. An adapter is fixed to the limbus body. The adapter includes curved slots for accepting fixing screws... | 11/27/1990 |
| 4967479 | Position relocation device A relocation device has a housing, a first sight tube having a viewing opening through which a user can look to sight an object substantially along a first line of sight, a second sight tube having a viewing opening through which a user can look to sight ... | 11/06/1990 |
| 4902128 | Apparatus for harmonizing a plurality of optical/optronic axis of sighting apparatus to a common axis Appartaus is disclosed for harmonizing onto a common reference axis the optical/optronic axes (4;5;18) of an aiming apparatus consisting of day sight channel (3) and combined thermal image/laser reception channel (1) with a stand alone laser transmitter (... | 02/20/1990 |
| 4483598 | Gun sight This invention provides an optical sight comprising a first telescope having a fixed increasing magnification whose image is combined and overlayed with the image of a second telescope having a selectable increasing magnification. The magnification of the... | 11/20/1984 |
| 4428671 | Optical device for vertically positioning a sextant An optical device for vertically positioning a sextant to minimize the "tilt error" which occurs in a measured angle of altitude whenever the sextant is not held orthogonal to the horizon. The optical device can be fixed to the sextant and provides in the... | 01/31/1984 |
| 4421407 | Image combining sextant or the like An improved optical measuring instrument having an image combining mirror which reflects part of the light from one source and transmits part of the light from another source and superimposes such reflected and transmitted light over the entire surface of... | 12/20/1983 |
| 4413906 | Passive optical rangefinder/sextant having search capability Uniquely integrating a search mirror and a deflection mirror with a passive ptical rangefinder and a remote sextant, enhances the operation of both devices. The improved rangefinder/sextant provides day/night 360° azimuthal and at least -5° to about 60°... | 11/08/1983 |
| 4367949 | Aiming method and means A method of aiming or aligning in which two overlapping fields of view fixed with respect to each other are produced, one of which is inverted and reversed with respect to the other and superimposed thereon. Given a target in the overlapping fields of vie... | 01/11/1983 |
| 4352556 | Reflector for electrooptical distance measurement A reflector for electrooptical measurement of the distance between a first (3) and a second point (4) is arranged with a right angle sighting device (13) in a common case (8). The reflector (6) may thus be set up at a point (5) where the directions to the... | 10/05/1982 |
| 4339198 | Geodetic instrument The combination with a sextant embodying an index mirror rotatable about a predetermined axis to bring a sighted object into juxtaposition with the line of sight of the optical system at the center of the horizontal mirror of an arcuate informational grat... | 07/13/1982 |
| 4245393 | Instant position finder and course plotter The present invention is directed to an instant position finder and course plotter. A first embodiment of the present invention relates to a three arm protractor which includes a circular base member, a fixed central arm and a movable left and right arm. ... | 01/20/1981 |
| 4232965 | Optical sighting device A handheld optical sighting device having a sighting means for direct forward observation and reflective surfaces that enable images of two objects, one directly ahead of and one directly to the rear of an observer to coincide when the device is aligned w... | 11/11/1980 |
| 4162124 | Passive optical rangefinder-sextant A passive opto-electric rangefinder with remotely controllable index mirr independently rotatable about normal axes, each axis perpendicular to the line-of-sight.... | 07/24/1979 |
| 4093378 | Alignment apparatus This describes an apparatus and method especially adapted for positioning a semiconductor wafer in a preferred plane with respect to a photomask so as to achieve improved photolithographic focusing. The apparatus comprises a holder, provided with a surfac... | 06/06/1978 |
| 3992106 | Error cancelling scanning optical angle measurement system An attitude determining system for vehicles, such as spacecraft or for ground-based environments measures the angle between a reference and the line-of-sight to a star or other celestial object of known position or to aircraft and missiles. The system inc... | 11/16/1976 |
| 3985446 | Remote controlled, CRT digital display, LLLTV camera-sextant A device to provide a ship's navigator with information day and night, as to the altitude of celestial bodies on a CRT display with digital display of the altitude and time on the CRT and/or LED read-out.... | 10/12/1976 |
| 3972620 | Azimuth angle measuring apparatus A straight line whose azimuth angle is to be measured, such as the angle of a gap of a magnetic head assembly relative to a disk radius, is imaged on an evaluation plane via a lens and a pair of deflecting mirrors, the first of which is semi-transparent. ... | 08/03/1976 |
| 3937579 | Process for the double-sided exposure of a semiconductor or substrate plates, especially wafers, as well as apparatus for the purpose of parallel and rotational alignment of such a plate The invention concerns a process for the two-sided exposure of a semiconductor or substrate plate, especially exposure of a wafer, through exposure masks which are arranged in plane parallel, parallel and rotational alignment to either side of a semicondu... | 02/10/1976 |
