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 |
| 4857178 | Centrifugal classifier A centrifugal classifier for classifying air, feed solids, fines and coarse particles has a housing with inlets and outlets. The housing is substantially parallelepipedic and contains a plurality of classifier rotors. Each rotor is connected to a separate... | 08/15/1989 |
| 4854186 | Apparatus for adjusting the length of a bowden cable An apparatus to adjust the length of the sheath of a bowden cable and capable of transmitting substantial forces. The bowden cable sheath terminates into a sleeve with a stepped outside diameter whereby it can be inserted into a structure fixed housing ag... | 08/08/1989 |
| 4855458 | Manufacture of phthalic anhydride by gas phase oxidation of a mixture of o-xylol and naphthalene A process for the manufacture of phthalic anhydride by oxidation in the gas phase of an o-xylol naphthalene mixture. By producing a solution of 1 to 80 parts by mass naphthalene in 99 to 20 parts by mass o-xylol at a temperature of 0° to 80° C., storing... | 08/08/1989 |
| 4855600 | Thermal imaging device in combination with an image production system An improved thermal imaging device is provided herein, which includes an internally-mirrored autocollimating mirror, a multi-element detector and a diaphragm in the mirror for limiting the aperture of the multi-element detector. In the improved device the... | 08/08/1989 |
| 4849038 | Method for depositing an interlining on a pitched cable for reducing friction and noise The invention concerns a method for depositing an interlining reducing friction and noise on a pitched cable consisting of a metal wire rope with a threaded helix. The preferred method consists in using a thermoplastic filament and raising the pitched cab... | 07/18/1989 |
| 4846002 | Racket-stringing tester A device for testing the stringing tension of a racket is made up of two components. The first component has a racket support surface with a recess therein. The second component is a cylinder containing a spring in compression with a slot in the cylinder ... | 07/11/1989 |
| 4835162 | Agonists and antagonists to nicotine as smoking deterents Agonists and antagonists to nicotine are used as smoking deterrents. The nicotinic antagonists have the following structural requirements: (1) Aromatic, cycloalkyl, and heterocyclic carbamic acid esters of di- and trialkylaminoalkyl alcohols. (2) Aromatic, cycloalk... | 05/30/1989 |
| 4824432 | Method for treating AIDS and other immune deficiencies and immune disorders Methods are provided for the treatment of pathological conditions connected with the production of interferons which destroy the immune system and possess damaging action on the cell system of mammals. Interferons are removed from the blood of mammals in ... | 04/25/1989 |
| 4825048 | Seat heater for integrated assembly into car seats A seat heater for integrated assembly into car seats has at least two or several segments and faces, respectively, of any desired shaping. The heater includes several flat, electrically interconnected resilient heating elements (1.1/1.2) either forming a ... | 04/25/1989 |
| 4820057 | Method and apparatus to contactlessly measure the brake temperatures of passing railroad cars A method is described to contactlessly measure the brake temperatures of passing railroad cars, whereby the temperatures of all current practical brake types, for instance shoe and disk brakes at the wheels, but also of separate brake disks, can be measur... | 04/11/1989 |
| 4817271 | Apparatus for the manufacture of a flexible heating appliance A method for manufacturing a flexible heating appliance comprises placing a heating circuit comprising at least one heating wire between two layers of textile material and combining the latter either directly or with the aid of an adhesive layer, by apply... | 04/04/1989 |
| 4815211 | Emergency seat belt cutter An emergency seat belt cutter for mounting in the passenger compartment of a vehicle. The cutter has a handle, a long and narrow blade mounted longitudinally in a blade support portion integral with the handle and lugs on the handle for engagement with a ... | 03/28/1989 |
| 4814509 | Preparation of pure 2,2-dimethyl-1,3-propanediol Crude 2,2-dimethyl-1,3-propanediol (NPG) is distilled in the presence of sulfuric acid, phosphoric acid or a mixture thereof, with the pH value being set between 6.5 and 7.5, preferably between 6.9 and 7.1 to prepare pure 2,2-dimethyl-1,3-propanediol.... | 03/21/1989 |
| 4813312 | Power-wrench, a boiling spindle and an operational method A power-wrench bolting spindle (1) is used to insert and tighten screws or nuts. The bolting spindle is driven at one end by a motor through a reduction gear (5) and at its other end a bolting tool is seated. A torque sensor (7) is mounted between the mot... | 03/21/1989 |
| 4814722 | Amplifier for timed electrical measurement signals An amplifier for timed electrical measured signals loaded by a relatively high spurious DC voltage and fed to an analog-digital converter allows accurate measurement values using analog-digital converters of comparatively low resolution. The invention pro... | 03/21/1989 |
| 4808747 | Process for producing alkylidene compounds and arylidene compounds Alkylidene compounds and arylidene compounds are prepared by reacting the corresponding CH-acidic compounds with carbonyl compounds in the presence of a catalyst comprising a metal compound of a metal of Groups IIA, IIIA, IVA, IB, IIB, VIB, VIIB, or VIIIB... | 02/28/1989 |
| 4803887 | Flow-metering system for milk-collecting vehicle The object of the invention is to so design a flow-meter system for milk-collecting vehicles, that a pump, a pulse-controlled sampling device, an air separator and a flow-meter with pulse generator and display are in series in the operational direction, w... | 02/14/1989 |
| 4795148 | Combination of antistasis devices An exercise device for the feet and legs, where the device has foot plates for exercising a supine person's feet; calf squeezers for compressing the calf muscles when the feet are exercised; and a support structure holding the foot plates in a vertical po... | 01/03/1989 |
| 4792284 | Device for creating and exploiting a pressure difference and the technical application thereof A device for creating a pressure difference in the flow of a fluid which may be a liquid or a gas and a number of technical applications. The fluid medium is fed along the longitudinal axis of a double cone, consisting of two coaxial hollow cones linked b... | 12/20/1988 |
| 4790708 | Device for emptying containers A device for emptying flexible or rigid containers having flexible discharge stubs for in bulk goods where the discharge stubs are sealable by being tied shut and always issue into the emptying device from where the in bulk goods are conveyed out by parti... | 12/13/1988 |
| 4788260 | Water-dispersible binders for cationic electropaints, and a process for their preparation The invention relates to water-dispersible binders which are intended for cationic electropaints and are based on reaction products which are formed from modified epoxy resins and primary and/or secondary amines and which can, if desired, also contain cro... | 11/29/1988 |
| 4788343 | Production of cycloheptanone Cycloheptanone (suberone) is prepared by first evaporating suberic-acid esters which are reacted in alcoholic and/or aqueous dilution in the gas phase on aluminum oxide support catalyst doped with zinc oxide and/or cerium oxide at temperatures between 300... | 11/29/1988 |
| 4788342 | Process for preparation of 4,4,8,8,10-pentamethylbicyclo[4,4,0]-decene-(1,6)-one(2) 4,4,8,8,10-pentamethylbicyclo[4,4,0]-decene-(1,6)-one(2), is produced from the bottom product of the acetone condensation reaction collecting in the production of isophorone by fractionation. A ketone blend consisting essentially of C15 compoun... | 11/29/1988 |
| 4782730 | Straddling gasket cutter A gasket cutting assembly for cutting an inner diameter and an outer diameter of a gasket simultaneously. The assembly has a rectangular bar base portion with a longitudinal slot therein and a blade at one end. An L-shaped adapter arm with a second blade ... | 11/08/1988 |
| 4782965 | Childproof closure system A child-proof container closure, in particular for bottles, with a threaded inner cap and with an opposite, axially displaceable outer cap, a coupling with at least one elastically flexible coupling element being provided between these caps. The container... | 11/08/1988 |
| 4781060 | System for detecting wheel-damage The invention concerns a system to detect irregularities in the geometry of railway wheels. The system is characterized in that a linearly expanding accelerometer is solidly joined to the rail underneath its head. The accelerometer sensitivity is constant... | 11/01/1988 |
| 4774187 | Cell-culture apparatus The invention concerns an apparatus for growing cell cultures wherein the cultures are located in at least one liquid nutrient medium and the nutrient medium or media are introduced through at least one pump-driven feed line, and where a gas (oxygen, nitr... | 09/27/1988 |
| 4772472 | Formed or molded body and method and apparatus for manufacturing such body A formed or molded body, a manufacturing method and a manufacturing apparatus therefor, wherein several equal or different active ingredients in suitable, equal or different carrier substances are filled at the same time side-by-side without a partition i... | 09/20/1988 |
| 4769400 | Heat-curable binder mixture The invention relates to a heat-curable binder mixture which comprises an organic synthetic resin A and a crosslinking agent B. Said synthetic resin A can be an epoxy resin, a polyester resin or an acrylate resin having a number average molecular weight o... | 09/06/1988 |
| 4758510 | Simplified in-vitro interferon production Interferon is produced in-vitro from whole blood, obtainable from animals or humans including blood from corpses or retroplacental blood, in a simplified non-critical process preferably carried out in a sterile system of interconnected plastic bags. The b... | 07/19/1988 |
| 4751618 | Automatic lighted automobile vanity mirror and lighting circuit therefore A lighted automobile vanity mirror for mounting on an automobile sun visor has a switch for operating the illumination only when the vanity mirror is in the vertical position. This switch is a ball contact switch which rolls from an inoperative horizontal... | 06/14/1988 |
| 4748241 | Process for producing aqueous N-methylmorpholine-N-oxide solutions N-methylmorpholine-N-oxide is prepared by reacting the azeotrope of methylmorpholine and water with an aqueous solution of hydrogen peroxide. The reaction solution product is thereupon concentrated to the desired content in N-methylmorpholine-N-oxide.... | 05/31/1988 |
| 4745781 | Assembly of tightly adjacent eye needles The invention concerns an assembly of sets of tightly adjacent eye needles (12) for filling-yarn knitting machinery. One set each of eye needles (12) is anchored by injection-molding in supports (8,9) at mutually equidistant positions, the needles being m... | 05/24/1988 |
| 4740019 | Pipe adapter The invention concerns a pipe adapter with an insertion stub for the pipe end to be connected, said stub including an inner cone receiving a correspondingly shaped outer cone at one end (press end) of a sealing bush slipped on the pipe end, the other end ... | 04/26/1988 |
| 4738289 | Apparatus for weighing granular or pulverulent bulk goods An apparatus for weighing granular or pulverulent bulk goods, where the bulk good is moved by reduced pressure from a silo through at least one conveyance duct to a scale and where the flow of material is lowered by increasing the proportion of air toward... | 04/19/1988 |
| 4734191 | Apparatus for the intermittent aeration of liquids An apparatus for the aeration of off-water or the like media in an aeration tank with the aid of an aeration face arranged below the water surface. The device comprises a rigid, self-supporting supporting body provided with througholes or being of porous ... | 03/29/1988 |
| 4721741 | Heat-hardenable binder mixture The heat-hardenable binder mixture based on organic resins comprises an organic resin having primary and/or secondary and, if appropriate, also additional tertiary amino groups and a cross-linking agent based on an organic compound containing at least 2 c... | 01/26/1988 |
| 4720528 | Substrates with flexible coatings from epsilon-caprolactone modified acrylics Flexible coatings are applied to the outer surfaces of automotive vehicles having metal and plastic portions from coating compositions having about 40 to 95% by weight of an epsilon-caprolactone modified acrylic polymer and about 5 to 45% by weight of an ... | 01/19/1988 |
| 4669722 | Antistasis device A pair of foot attachments for performing leg exercises so as to facilitate efficient pumping action of blood from deep leg veins. Each foot attachment incorporates a high sock with a flexible foot panel connected by springs to a more rigid panel. The pre... | 06/02/1987 |
| 4666451 | Clamp to be actuated by a hand prothesis The instant invention refers to a clamp to be used by persons whose hand has been amputated and use hand protheses actuating fingers by means of electrical or mechanical command mechanisms. Since in most cases these elements do not permit grasping or seiz... | 05/19/1987 |