In 1608, Dutch eyeglass maker Hans Lipperhey filed the first patent for a working telescope. The patent was denied.
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| Number | Title | Issue Date |
| 5651560 | Support plate for a ski binding A system for changing the stiffness of a ski includes an engagement member attachable to a ski and having a free end, and an impedance device engageable with the free end of the engagement member as the ski bends to change the stiffness of the ski.... | 07/29/1997 |
| 5636836 | Hockey stick shaft A composite hockey stick shaft of generally uniform cross section along a longitudinal axis having a first pair of opposing sides perpendicular to a neutral bending axis, and a second pair of opposing sides parallel to the neutral bending axis, wherein th... | 06/10/1997 |
| 5623781 | Pills or pellets containing seeds and inert carrier material and method for their preparation Pills or pellets containing seeds and inert carrier material, characterized in that the inert carrier material forms the core of the pills or pellets, while the seeds are distributed in a multitude around the core, adhering to that core in an adhesive lay... | 04/29/1997 |
| 5615905 | System for modification of the vibrational properties of a ski A system for the modification of the vibrational properties of a ski comprised of a support member having a fixed end attached to the ski, and a free end that is movable longitudinally in a holder attached to the ski and is connected by means of a piston ... | 04/01/1997 |
| 5607250 | Quick connect coupling A coupling comprising a male and female half (11, 12) that are coupled together in axial alignment. A keying portion (13) is provided at one end of the male half (11) which has at least one keying element (14) with a bearing surface (20). The female half ... | 03/04/1997 |
| 5605834 | Composting device A composting device including a drum rotatably arranged about an axis slightly inclined to the horizontal, and having a feeding opening for composting material at the higher situated side of the drum and a discharge opening for finish composted material a... | 02/25/1997 |
| 5603234 | Multiple lock assembly A lock assembly for locking and unlocking a door comprising a lock bar moveable between a locked and unlocked position, three locks, each of which have lock arms moveable between a locked and an unlocked position, and a linkage connecting the lock arms to... | 02/18/1997 |
| 5601071 | Flow control system A control system for regulating a flow rate of a heat transfer fluid in a heat transfer system, the heat transfer system having a heat transfer fluid flow path, flow control device for creating flow along the path, a fuel source for providing a combustibl... | 02/11/1997 |
| 5596514 | Electronic control system for a heating apparatus An electronic control for a heating apparatus and specifically a deep fat fryer is provided. The electronic control includes a temperature sensor for sensing the temperature of a cooking medium during a cooking cycle. Cooking medium temperature sensed dur... | 01/21/1997 |
| 5589639 | Sensor and transducer apparatus A force sensing system for a CPR device which generates an intelligible output signal corresponding to a force parameter. The system is comprised of a sensing device for sensing force exerted thereon and producing an electric reactance signal in response ... | 12/31/1996 |
| 5588916 | Torque control device for rotary mine drilling machine A device reducing the deleterious torque in a shock absorbing, rotary drive coupling unit used with a rotary mine drilling machine comprising: a drive plate connectable to a drive shaft of the rotary drilling machine, a driven plate connectable to a drive... | 12/31/1996 |
| 5587037 | Multi-layer sheet material having a refractive surface and method for making same A process for producing a multi-layer sheet material having a refractive foil layer therein. The multi-layer sheet material providing an image having depth, dimension, contrasts, glow and brilliance.... | 12/24/1996 |
| 5586140 | Plasma melting method and plasma melting furnace A plasma melting furnace has a melting chamber having an anode torch and a cathode torch made of graphite and having a electric conductor disposed on the bottom thereof. When the furnace is operated, the anode torch, having an inflow of electrons, which f... | 12/17/1996 |
| 5585179 | Working protection cover and parts thereof, and method of manufacturing the working protection cover A working protection cover 1, 8 for preventing a vehicle body from becoming damaged during an automobile assembly line operation is free from the possibility of easily slipping off position upon mere contact of an operator with the cover, and has good dur... | 12/17/1996 |
| 5582755 | Apparatus and method for classifying a medium in a cooking chamber A deep fat fryer includes a controller operatively connected to a heating element for controlling the operation thereof to apply heat to a cooking chamber. A temperature sensor is disposed in the cooking chamber for measuring the temperature in the cookin... | 12/10/1996 |
| 5581967 | Flooring adapter transition device A flooring adapter device for providing a transitional flooring surface between two flooring materials of different heights. The flooring adapter device includes a generally planar central portion which is sloped relative to a base portion. The sloped cen... | 12/10/1996 |
| 5579983 | Welding apparatus A welding apparatus is provided which includes a rail member 5 installed along a side and a corner portion of a steel frame post, a pinion 46 mounted to a horizontally movable shifting member 50 such that even at the corner portion of the steel frame post... | 12/03/1996 |
| 5577720 | Self-adjusting sensor A sensing device comprised of a sensing circuit which changes its operating characteristics when an object comes near it. The sensing circuit produces a change in output voltage proportional to the change in relative distance between the sensing circuit a... | 11/26/1996 |
| 5575194 | Electronic control system for a heating apparatus An electronic control system for controlling a heating apparatus. The control system accurately controls the temperature of a medium, while minimizing the wear of heating element components.... | 11/19/1996 |
| 5569190 | Hypodermic fluid dispenser A hypodermic fluid dispenser and a collapsible body for the hypodermic fluid, with a hypodermic needle injecting the fluid once sufficient pressure is applied to collapse the body. There is also disclosed an electrical hypodermic fluid dispenser having a ... | 10/29/1996 |
| 5564342 | Railway vehicle with variable trim body A railway vehicle having a variable trim body, comprising two bogies with respective swinging transverse members pivotally connected to the body, and a control system for controlling roll of the body about its longitudinal axis, by use of linear actuators... | 10/15/1996 |
| 5558024 | Body roll control system for a railway vehicle with variable trim body A body roll control system in a railway vehicle with a variable trim body, wherein two pairs of fluid pressure linear actuators are substantially vertically interposed between the body and the opposite sides of two bogies. The control system comprises a s... | 09/24/1996 |
| 5552054 | Composite membrane, its application and process for the dehydration of organic solvents The invention relates to a composite membrane with a porous polymer support layer and a polymer top layer, whereby the porous polymer support layer is of polyacrylonitrile (PAN), polyacrylamide, polyetheretherketone (PEEK), polyetherketone (PEK), polysulf... | 09/03/1996 |
| 5551720 | Apparatus for selectively varying the stiffness of a ski A system for changing the stiffness of a ski having a boot sole with first and second movable portions, and a biasing device for urging the portions apart to add stiffness to the ski.... | 09/03/1996 |
| 5549394 | Bearing arrangement having a polyimide graphite-fiber reinforced composite embedded therein A bearing arrangement comprised of a substrate having a plurality of self-lubricating polyimide graphite-fiber reinforced composite bearing members secured to provide a bearing surface. The bearing arrangement being well suited for use under harsh conditi... | 08/27/1996 |
| 5547166 | Hose coupling for compressed air The invention relates to a hose coupling for compressed air having a safety locking device. The safety locking device comprises a disconnectable male member which is caught by locking members in a female member until the overpressure in the hose and the t... | 08/20/1996 |
| 5544366 | Elastic waist structure for trousers and skirts An elastic waist structure for a pair of trousers or skirt utilizing at least one elastic strip material which is always kept from sight. The strip material or materials stretch or contract behind a fabric cover or waist fabric. A tuck whose top edge is o... | 08/13/1996 |
| 5540425 | Article depositing apparatus A deposit processing module comprising a first transport having a first end for receiving envelopes and single document deposits and a second end from which the deposits are discharged, and a second transport operatively positioned for receiving and retur... | 07/30/1996 |
| 5540349 | Container closure with separable wall segments A closure or lid for use with a container having an open end and a rim extending along the perimeter of the open end. The closure comprises a center portion which covers the container and an integral wall structure extending along the periphery of the cen... | 07/30/1996 |
| 5538366 | Accelerator ring A wear ring constructed for use with a pneumatic tube system carrier of a type having two spaced apart wear rings positioned near the axial ends of the carrier. The wear ring is comprised of a rigid, yet flexible, annular support member having an outer cy... | 07/23/1996 |
| 5535604 | Apparatus for artificial wearing and fading of textile materials Apparatus which is able to artificially produce wearing and fading of textile materials including an enclosure which is a barrel (1). This barrel is able to be placed into rotation around an axis (5), the barrel having an opening (6) which is equipped wit... | 07/16/1996 |
| 5534682 | Article depositing apparatus A document processing system comprising a sensor array for sensing the size and position of a document; a movable magnetic scanner for scanning the document for coded information thereon; an imager for obtaining digitized image data of the document; a mov... | 07/09/1996 |
| 5533744 | Ski brake spur A brake spur for a ski brake arm, which at a free end possesses a transversely extending, plate-shaped extension. The plate-like extension makes an angle with the longitudinal axis of the brake spur and forms a gripping member with a brake edge. In order ... | 07/09/1996 |
| 5526887 | Device for drilling holes in the crust of the earth, especially for drilling oil wells A device for drilling holes (1) in the crust of the earth, especially for drilling oil wells, wherein a rotary bit (2) is fitted in a drill string (4), within which drilling fluid is pumped downwardly and, upon return, conveys cuttings to the surface. A p... | 06/18/1996 |
| 5524919 | Binding adapter plate The invention relates to binding adapter plate for intermediate placement between the front and/or rear jaws of a ski binding and a ski. The binding adapter plate includes holes in the form of cylindrical bores which are dimensioned to receive fasteners f... | 06/11/1996 |
| 5516427 | Screw type dewatering machine A screw type dewatering machine according to the present invention includes inner and outer sleeves (1, 2), an annular space chamber (3) defined therebetween, a coil-like screw (4) rotatably disposed in the annular space chamber (3), and drain screens (5,... | 05/14/1996 |
| 5513794 | Method for fixing stopper ring to pipe spigot A method for fixing a stopper ring to the outer periphery of the spigot of a cast iron pipe for preventing separation of the pipe from another pipe. A single or plural annular grooves are formed on the inner periphery of the stopper ring, and a brazing fi... | 05/07/1996 |
| 5511816 | Base plate and movable anti-friction device of a ski binding A ski binding including a rocking anti-friction device for cooperating with a base plate to maintain the level of friction between the ski boot sole and the sole holder, as the ski boot is laterally released from the ski binding.... | 04/30/1996 |
| 5506896 | Intercommunication system An intercommunication system for transmitting signals through a door, and having piezo transducer devices mountable on each side of the door, a matrix of analog switches connecting the piezo transducer devices to the input and output of a bridge amplifier... | 04/09/1996 |
| 5501483 | Automatic release ski binding The invention relates to a toe piece for an automatic release ski binding. The toe piece is comprised of an upper housing and a base plate which is connected at one end with the upper housing. The upper housing and the base plate are additionally connecte... | 03/26/1996 |