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| Number | Title | Issue Date |
| 5122800 | Variable successive approximation converter Analog electrical signals are converted to digital form by analog to digital sampling in accordance with a variable successive approximation technique that permits extremely wide dynamic range coupled simultaneously with extremely high bandwidth capabilit... | 06/16/1992 |
| 5082364 | Rf modulated optical beam distance measuring system and method A first or ranging light beam which functions as a carrier is amplitude modulated with a first radio frequency f1 ; a second amplitude modulated light beam source functions as a local signal at a frequency f2 for a heterodyne convers... | 01/21/1992 |
| 5056080 | Optical recording/reproducing system using interference techniques Apparatus and method are disclosed for encoding information and recording same as sets of variably spaced related marks on the optical record. The encoded information is read by illuminating each set of such recorded marks with a coherent read light to ca... | 10/08/1991 |
| 5046105 | Audio signal equalizer having accelerated slope phase shift compensated filters A tone control shelving equalizer providing low shelf (bass) boost and cut, and high shelf (treble) boost and cut is disclosed wherein the active filter stages provide sharpened (accelerated) amplitude versus frequency response characteristics at the band... | 09/03/1991 |
| 5021763 | Environment protected industrial microcomputer An environmentally sealed, EMI suppressed shock/vibration protected microcomputer workstation is provided by a sealed enclosure of stainless steel having a lower base portion for containing a dampened, spring suspension platform carrying the CPU and elect... | 06/04/1991 |
| 5009394 | Metal fence post extractor A post extracting apparatus is disclosed in which a unitary bent plate of substantial thickness and strength having a "T" shaped aperture located in a plate portion adjacent the bend allows the plate to be slipped down over a T-shaped fence post to fit wi... | 04/23/1991 |
| 4981273 | Air baffle for stunt kite and stunt kite An air baffle for a stunt kite affording enhanced kite control in gusty winds in which a flexible material is disposed transversely to the keel rod and adjacent to the trailing edge of the kite. Cooperating with the air baffle to provide structural and fu... | 01/01/1991 |
| 4975943 | Telephone set having outbound call restriction logic circuit In an extension (or second) telephone set, a logic circuit powered by standard line current is connected between the standard telephone key encoder that receives and encodes the user entered key dialing digits and a dialing signal converter that produces ... | 12/04/1990 |
| 4910778 | Signal enhancement processor for stereo system The enhancement processor disclosed herein includes left and right channels through which the components of the stereo signal are fed, and a side channel that receives a difference signal derived from the main left and right channel signals. The side chan... | 03/20/1990 |
| 4891841 | Reciprocal, subtractive, audio spectrum equalizer An equalizer circuit is disclosed having adjustable bandpass filters connected with operational amplifiers in feedforward and feedback paths so as to form frequency selective boost and cut signal components, which are then combined to form the equalized o... | 01/02/1990 |
| 4889027 | Rhythm recognizing apparatus and responsive toy A musical electric signal generated by electric signal generator 1 is supplied to a rhythm signal extractor 2 so that a rhythm signal is extracted. Interval data of rhythm signal peaks are stored in memory 3. Cycle detector 4 detects a musical rhythm cycl... | 12/26/1989 |
| 4885707 | Vibration data collecting and processing apparatus and method In a system for predictive maintenance of machinery based on vibration data history, a portable battery operated vibration data collector and processor unit (10) is equipped with an electro-optical wand (18) for reading a bar code affixed to each data col... | 12/05/1989 |
| 4882664 | Synchronous modulation circuit In pulse width modulation (PWM) power regulation and amplification circuits, separate DC rectification and filtering circuitry is eliminated by providing synchronous output switching directly from an available AC source. Output switch steering logic conne... | 11/21/1989 |
| 4879461 | Energy field sensor using summing means An energy field disturbance sensor comprises an energy field emission means such as a light emitting diode; the emitted field may contain a time-varying component. An energy sensing device such as a photodiode receives the field energy to produce a sensin... | 11/07/1989 |
| 4864199 | Electronically controlled electric motor with variable power output Electric motors which utilize a combination of electromagnets and permanent magnets to effect relative rotation of motor components and have the following characteristics: (1) all of the magnets incorporated in one of the relatively rotatable motor compon... | 09/05/1989 |
| 4855581 | Decoding of barcodes by preprocessing scan data Scanned barcodes represented by an electrical signal are preprocessed in a PLA and delivered to a microprocessor in a form that permits efficient final processing of the data. High speed edge detection produce edge markers for the control logic and counti... | 08/08/1989 |
| 4850295 | Davit system for an inflatable dinghy or other small inflatable boat A davit for an inflatable dinghy or other small inflatable boat including a pair of lock devices secured to the stern of the carrier boat for engaging and supporting hanger assembly mounted on the inflatable dinghy and enabling the dinghy, to be swung bew... | 07/25/1989 |
| 4815733 | Photosensing video game control system A robotic game apparatus comprises a CRT display. A robot has a photo detector which faces a screen of the CRT display and detects an image on the screen. On the screen of the CRT display, images which differ, for example, in brightness or the like are fo... | 03/28/1989 |
| 4813682 | Video target control and sensing circuit for photosensitive gun A television game apparatus according to this invention reads white picture data from a program ROM (6) to transfer it to a video RAM (8) and displays, on a television monitor (11), the white picture data, together with target or other data read from a ch... | 03/21/1989 |
| 4803909 | Apparatus and method for automated braiding of square rope and rope product produced thereby An apparatus automatically braids a plurality of rope forming strands onto a center core member in a braiding pattern that causes the resulting rope to have a generally square shaped cross section. The braiding strands are fed to a braiding point on the c... | 02/14/1989 |
| 4801489 | Printed circuit board capable of preventing electromagnetic interference A printed circuit board capable of preventing electromagnetic interference comprises a base plate composed of an insulating material. On the main surface of the base plate, a first electric conductive layer is formed by etching copper foil, which includes... | 01/31/1989 |
| 4799635 | System for determining authenticity of an external memory used in an information processing apparatus A system is disclosed for determining the authenticity of computer software when used with a main processor unit. The software is stored in an external memory which may, for example, be in the form of a ROM cartridge, floppy disk or the like. The main pro... | 01/24/1989 |
| 4783812 | Electronic sound synthesizer An electronic source synthesizer that employs frequency modulation. Wave-form data of both a fundamental wave and a modulated wave are stored in a RAM as 6-bit digital data. A sine wave signal is produced by modulation wave frequency data and the wave-for... | 11/08/1988 |
| 4778177 | Baseball toss-up apparatus for batting practice and game play A spring loaded arm mechanism is incorporated into a baseball home plate support for tossing a regulation or practice baseball, from ground level, upwardly into the batter's strike zone. A ball launching arm, arm bias spring, arm latch and a release are a... | 10/18/1988 |
| 4763300 | Front loading apparatus for a memory cartridge utilized for a data processing machine A front loading apparatus typically installed in a data processing machine for receiving a memory cartridge. The apparatus includes a frame disposed within the machine, and a tray pivotally mounted to the frame for rotation between a loading and an operat... | 08/09/1988 |
| 4754270 | Apparatus for varying the size and shape of an image in a raster scanning type display A displaying apparatus using a raster scanning type display such as a CRT, wherein vertical and horizontal positions are addressed respectively by an address counter for displaying an image stored in a character memory containing a matrix of horizontal an... | 06/28/1988 |
| 4752834 | Reciprocating recording method and apparatus for controlling a video recorder so as to edit commercial messages from a recorded television signal In order to edit commercial messages from an off-the-air video recording of a television signal, method and apparatus are disclosed for automatically operating a video tape recorder (VTR) so that it alternates between a normal forward record mode, and a r... | 06/21/1988 |
| 4745478 | RF switch An RF switch comprises a housing in which a board is contained. To the board, two input ends connected respectively to an F-connector and an RCA plug and one output end connected to an antenna terminal of a TV receiver by an F-plug are connected. On the b... | 05/17/1988 |
| 4729563 | Robot-like game apparatus A robotic game apparatus comprises a CRT display. A robot has a photo detector which faces a screen of the CRT display and detects an image on the screen. On the screen of the CRT display, images which differ, for example, in brightness or the like are fo... | 03/08/1988 |
| 4645509 | Prosthetic foot having a cantilever spring keel In a prosthetic foot constructed to store strain energy as the foot reacts to the load of the amputee's body during walking, running, jumping, etc., and then to release the stored energy to create foot lift and thrust which complements the user's natural ... | 02/24/1987 |
| 4589659 | Foldable liquid crystal display unit A liquid crystal display unit (20) includes a main housing (21), a mirror housing (22) and a sub housing (23) which are successively connected with each other in a rotatable manner. The main housing (21) is provided on both sides with a pair of rearwardly... | 05/20/1986 |
