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"Transmission of documents via telephone wires is possible in principle, but the apparatus required is so expensive that it will never become a practical proposition."
Dennis Gabor, British physicist
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| Number | Title | Issue Date |
| 4870717 | Meat tenderizing device A meat tenderizer for tenderizing a meat by cutting fibrous tissues and the like contained in the meat into pieces comprises a splitable body case and provided with an inner space, a case cover detachably attached to the body case so as to be opened in a ... | 10/03/1989 |
| 4871234 | Liquid crystal display device An electro-optical device has a plurality of electro-optical elements arranged in a matrix and optically activated selectively in response to voltage pulses applied thereto. Each electro-optical element is comprised of first and second electrode layers op... | 10/03/1989 |
| 4868805 | Inspection apparatus The present invention provides an inspection apparatus for inspecting an object such as an information storage medium or an information recording/reproducing head under set inspection conditions, which comprises: a sensor for identifying the type of objec... | 09/19/1989 |
| 4868709 | Electromagnetic drive circuit An electromagnetic drive circuit comprises a coil for detecting and driving a permanent magnet; a comparator for generating an output when the induced voltage of the coil exceeds a reference voltage; a pulse generator for generating a drive pulse train in... | 09/19/1989 |
| 4868596 | Motor driven shutter for camera A motor driven shutter for a camera provided with a drive member moving in a lens operating area and an exposure operating area that are parted in one and the other, only one motor capable of reciprocal operation for operating said drive member, a range m... | 09/19/1989 |
| 4867658 | Rotary vane compressor having pressure-biased vanes A rotary vane compressor has a cylinder having an oval-shaped compartment in which is rotatably mounted a rotor. Front and rear side blocks close the opposite ends of the cylinder. A plurality of vanes are slidably mounted in slots formed around the rotor... | 09/19/1989 |
| 4865994 | Detection method for amino acid derivatives A method for detecting amino acid derivatives in which 2-anilino-5-thiazolinone derivatives of amino acids are reacted with radioactive iodine siotope-labeled amino compounds or with fluorescent amino compounds to form phenylthiocarbamyl amino acid deriva... | 09/12/1989 |
| 4866564 | Electromagnetic drive circuit Herein disclosed is an electromagnetic drive circuit for driving a pendulum or the like, comprising: a coil for detecting and driving a permanent magnet; a reference voltage source having a variable reference voltage; a comparator for generating an output... | 09/12/1989 |
| 4866271 | Relative displacement control apparatus A relative displacement control apparatus provides both coarse and extremely fine precise control over displacements between a sample and a detecting probe as required, e.g. in operations of optical instruments, analyzing instruments and scanning tunnelin... | 09/12/1989 |
| 4864346 | Program shutter There is disclosed a program shutter for use in a camera. The program shutter consists of a shutter mechanism and a control portion. The shutter mechanism has sectors for defining an opening and a stepper motor for driving the sectors. The control portion... | 09/05/1989 |
| 4864305 | D/A converter A digital-to-analog converting device, particularly useful in audio device such as compact disc players, including an adder (CA; CA1, CA2) for adding a common random data to a digital data (d) supplied at a constant period and to a sign-reversed data (d),... | 09/05/1989 |
| 4863805 | Rare earth-iron magnet A rare earth-iron permanent magnet is comprised of compacted Re-B-R type alloy particles in which R represents at least one element selected from rare earth elements and yttrium. The magnet has a sealing agent filling voids between the compacted Fe-B-R ty... | 09/05/1989 |
| 4863240 | Apparatus for actuating objective lens An apparatus actuates an objective lens in axial and circumferential directions through annular magnetic gaps which are formed by yokes and a magnet. In order to retain the objective lens in the neutral position in the circumferential direction, two or fo... | 09/05/1989 |
| 4864347 | Program shutter A program shutter has a plurality of shutter sectors driven in opening and closing directions by a reversible stepping motor to define a lens aperture during an exposure operation. An arithmetic circuit calculates an exposure amount corresponding to the b... | 09/05/1989 |
| 4861142 | Projection type liquid crystal displaying device Light emitted from a single light source is split into beams of bidirectional parallel light which are orthogonal to each other. Beams of the parallel light in each direction are reflected by a reflection optical system in such a direction that they becom... | 08/29/1989 |
| 4859101 | Device for cooling a carriage motor and printhead in a serial printer A printer has a print head, first heat-dissipating fins disposed on the print head for dissipating heat produced by the print head, a carriage for carrying the print head, and a motor for driving the carriage. Second heat-dissipating fins are disposed on ... | 08/22/1989 |
| 4859966 | Current amplifier circuit and a current amplifying type differential current converter circuit A current amplifier circuit includes a first, second, third and fourth transistor, each having the same polarity. The first transistor is connected in series with the second transistor and both have the collector and base thereof electrically connected. T... | 08/22/1989 |
| 4859805 | Printed wiring board A printed circuit board comprises a base plate and a circuit conductor formed on at least one of the opposed surfaces of the base plate. A heat-radiating film is formed on at least a portion of the surface of the circuit conductor, and an insulating film ... | 08/22/1989 |
| 4858391 | Sizing apparatus for an internal grinder Sizing apparatus for an internal grinder having an oscillation motor for oscillating a grinder wheel contacting the inner peripheral surface of an annular work piece, a sizing device to generate sizing signals for measuring the bore of the work piece, a m... | 08/22/1989 |
| 4858219 | Optical information recording reproducing memory system with both power control and optical irradiation inhibiting circuit There is provided an optical information recording and reproducing system which comprises a light source, a light beam power compensation circuit which can compensate a fluctuation of an emitted light beam power from the light source in response to a dete... | 08/15/1989 |
| 4856717 | Dispersing and grinding apparatus A grinding medium is filled in a grinding vessel of a dispersing and grinding apparatus. The medium is agitated by means of a cylindrical rotor provided within the vessel. A material entered into the vessel is ground and dispersed in liquid by means of mo... | 08/15/1989 |
| 4856424 | Apparatus for filler taping screen frame and apparatus for applying filling liquid to screen frame Disclosed are an apparatus for filler taping a screen frame and an apparatus for applying a filling liquid to a screen frame. The screen frame is held in such a manner as to be indexable 90 degrees, a tape is attached simultaneously on opposing two sides ... | 08/15/1989 |
| 4856924 | Printer According to the present invention, setting contents of a specified mode are selected in accordance with positions to which a printing head shifts, and the setting contents are set by operating switches in those positions. A switch for shifting the printi... | 08/15/1989 |
| 4854694 | Eye fixation monitor An eye fixation monitor for ophthalmological examination is provided which is capable of automatically monitoring the eye fixation without the ophthalmologist being required to initialize the eye fixation value. The eye fixation is monitored using deviati... | 08/08/1989 |
| 4854693 | Ophthalmic disease detection apparatus An apparatus operates in an observation mode for determining a specific spot within the eye of a patient and operates in a measurement mode for measuring protein particles contained within the specific spot. The eye is illuminated with a slit light to det... | 08/08/1989 |
| 4854692 | Ophthalmic examination apparatus Disclosed is an ophthalmic examination apparatus in which a laser beam is deflected at an eye fundus under examination to scan the eye fundus two-dimensionally, and light reflected back from the eye fundus is detected for photoelectric conversion to obtai... | 08/08/1989 |
| 4853682 | Data stored display device A data stored display device such as wrist watch comprises a central processing unit, a transmitting and receiving means for transmitting and receiving data and including a coil, RAMs written in and read out data under the control of the central processin... | 08/01/1989 |
| 4853679 | Method and apparatus for detecting surface discontinuities Grooves can be detected on both sides of non-magnetic materials, preferably in terry fabric, carpets, blankets, or the like. A sensor is provided, which can be either inductive or capacitive, and is positioned on one side of the material opposite a rotata... | 08/01/1989 |
| 4851805 | Method for the production of a sub-miniature fuse as well as sub-miniature fuse The invention relates to a method for the production of a sub-miniature fuse, as well as to a sub-miniature fuse. Known casing with three chambers and a separate cover are difficult to manufacture and are prone to faults due to their complicated shape. Ac... | 07/25/1989 |
| 4851792 | Temperature-compensated oscillator circuit A temperature-compensated oscillator circuit utilizes a quartz oscillator for producing an oscillating signal having a variable oscillator frequency which fluctuates in response to ambient temperature change. A variable semiconductor capacitor having a va... | 07/25/1989 |
| 4851164 | Method of manufacturing focal plates A focal plate for use in camera and a method of manufacturing the same are disclosed. The focal plate comprises an optical plate, a plurality of lens-like uneven portions regularly formed on the surface of the optical material, and a plurality of fine rug... | 07/25/1989 |
| 4848897 | Ophthalmological diagnosis apparatus An ophthalmological diagnosis apparatus is disclosed that has an optical spatial frequency filter, a double diffraction optical system whereby an eye fundus image formed at a first image plane that is conjugate with the eye fundus is again formed at a sec... | 07/18/1989 |
| 4846221 | Ball valve with built-in check valve A ball valve with a built-in check valve includes a valve casing having a passageway for a fluid, a ball having a through hole formed therein, also having a valve seat formed inside thereof at a position in the vicinity of one end of the through hole, and... | 07/11/1989 |
| 4845895 | Internal grinding machine An internal grinding machine for grinding the inner surface of a work comprises a traverser table (11) mounted on a bed (10) for sliding movement in the longitudinal direction of the bed, a grinding head (15) mounted on the table for free position adjustm... | 07/11/1989 |
| 4845046 | Process for producing semiconductor devices by self-alignment technology A method of manufacturing semiconductor device wherein the self-alignment technique is employed to simplify the manufacturing process and includes the steps of successively depositing multiple layer masking films comprising a first, a second and a third m... | 07/04/1989 |
| 4843408 | Thermal recording device A thermal recording device thermally records an image on a recording paper in the form of image segments gradated according to image information to collectively form the image. A thermal head has heating elements arranged in a row and activated to mark a ... | 06/27/1989 |
| 4842372 | Electro-optical device having an amorphous silicon resistive element with carbon An electro-optical device comprising: a pair of substrates, at least one of the substrates being light-transmissive; an electro-optical material sandwiched between the substrates; a plurality of electro-optical switching elements disposed on an inner surf... | 06/27/1989 |
| 4839874 | Electronic watch with moving member An analog type electronic watch having a step motor to drive hands has a movement indicator other than hands. The movement indicator has a magnet member and is driven with the magnetic influence of a rotor magnet of the step motor. The magnet member is ar... | 06/13/1989 |
| 4839854 | Data collection system having stationary unit with electromagnetic induction circuitry for bidirectionally relaying data A system for collection of data and entry of the data to a host computer has a portable, hand held, data collector for collecting data and a stationary data relay for receiving the data from the data collector and for transmitting the data to the host com... | 06/13/1989 |
| 4839550 | Controlled type magnetic bearing device A controlled type magnetic bearing device which has at least two radius direction magnetic bearings, characterized in that the radius direction magnetic bearing control device has either or both of a static unbalance compensator for suppressing a whirling... | 06/13/1989 |
