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...that "patent leather" got its name because the process of applying the polished black finish to leather was once patented?
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| Number | Title | Issue Date |
| 4268917 | Variably weighted vest A variably weighted vest is provided for use in exercise, such as jogging, skating, bicycling and horseback riding. The vest is preferably provided with a plurality of pockets for the reception of commonly available material such as sand, pebbles, small s... | 05/26/1981 |
| 4268918 | Novelty cap A novelty cap suitable for use as a head covering is provided with the appearance of one of a family of animals. The caps are all provided with at least one movable animal feature which a wearer of the cap may selectively operate by pulling on string conn... | 05/26/1981 |
| 4268919 | Joint endoprosthesis A joint endoprosthesis including a pivot body with a radially extending hole; a pin press fit in the hole; a recess extending into the pin from its end in the hole; wedging means for spreading the pin from its end in the hole; wedging means for spreading ... | 05/26/1981 |
| 4268920 | Endoprosthesis for a knee joint A knee joint endoprosthesis includes a femoral component, a tibial component and a slide bearing providing for relative pivotal movement between the components and formed of a femoral bearing half carried by the femoral component and a tibial bearing half... | 05/26/1981 |
| 4268921 | Intraocular lenses A multi-piece intraocular lens includes a medial light-focusing lens body and a plurality of position fixation members for holding the lens body in proper position in the eye. At least one of the position fixation members is separate from and attachable t... | 05/26/1981 |
| 4268922 | Prefabricatable, artificial lower leg A prosthetic lower leg or prosthesis comprising two plates mutually connected downwardly and to a prosthetic foot, while upwards they are enlarged into circular coacting sleeve halves, together forming an adjustable carrying sleeve. By means of an annular... | 05/26/1981 |
| 4268923 | Thigh prosthesis A thigh prosthesis or artificial leg comprising an upper socket portion designed to be secured, in use, to an amputee's stump, a lower leg portion, an articulation frame joining the socket portion to the leg portion, and resilient means for limiting and c... | 05/26/1981 |
| 4268924 | Syphon-operated closet bowl flush tank A syphon-operated closet bowl flush tank of the kind comprising an inverted bell (10) containing a liftable plunger disc (12) to initiate syphon action has a flush control valve (14) comprising a tubular body part (16) mounted vertically in the top (18) o... | 05/26/1981 |
| 4268925 | Sewage treatment system A self-contained, closed system, aerobic sewage treatment system designed for use in a house or in mobile situations such as a boat, plane, bus, train, etc. comprising a housing with a toilet and a main digestion tank and a series of secondary digestion t... | 05/26/1981 |
| 4268926 | Rescue tool A rescue tool with an extended hollow housing has the shaft of a tool bit mounted in one end thereof for reciprocable motion. A substantially solid hammer is manually driven to strike the tool bit, the hammer extending the greater portion of the length of... | 05/26/1981 |
| 4268927 | Combination tool A combination hammer, impact device, and screw driver has an elongated cylinder formed in the hammer handle in which is reciprocably carried a drive piston, spring urged under the force of a heavy spring, toward the open cylinder end at the base of the ha... | 05/26/1981 |
| 4268928 | Method and apparatus for applying a liquid on a moving web in patterns In order to pattern a web using a method for applying a liquid to the moving web on which a cohesive liquid shroud falling on the web from above is interrupted in a pattern, a fluid medium is blown transversely against the falling shroud to displace porti... | 05/26/1981 |
| 4268929 | Method and apparatus for cleaning rugs and mats A method and a washing machine for cleaning of rugs or mats having a nap or pile side, whereby the rugs or mats are successively conveyed along a conveying path and are exposed to cleaning operations, at least one of which is a pulsating operation, during... | 05/26/1981 |
| 4268930 | Inflatable mini boat A mini boat having a first plurality of elongated gas inflatable cells sted one upon the other and bonded into a single envelopmental unit which conforms closely to the human body for providing buoyancy thereof. The unit is formed to provide a center of ... | 05/26/1981 |
| 4268931 | Process of manufacturing an inner boot The present invention concerns an article of footwear to be placed inside a ski boot, and the process of its manufacture. The process according to the invention is characterized by the fact that the article of footwear is molded in its open position, thereby p... | 05/26/1981 |
| 4268932 | Sphere launching apparatus A sphere launching apparatus for use with a valve closure member for sequentially ejecting spheres in a pipeline, said apparatus having a releasing means pivotable about a first axis for engaging a valve closure member and a sphere catcher means pivotally... | 05/26/1981 |
| 4268933 | Bristles for an interproximal and periodontal toothbrush Bristles for a toothbrush arranged in repeating patterns of like and unlike shaped bristles, consisting of clusters of long, soft, bristles alternating with clusters of shorter, pyramidal shaped bristles which shorter bristles begin at the base of the lon... | 05/26/1981 |
| 4268934 | Cleaner for circuit boards A cleaner for circuit boards includes two elongate hollow housings positioned one above the other to provide a slot between two facing walls. Each wall has an aperture therein spaced from its ends, and brushes extending into the slot from the walls, both ... | 05/26/1981 |
| 4268935 | Carpet cleaning machine A carpet cleaning machine for uniformly spreading a powder onto a surface, working the powder into the surface and subsequently removing the powder and dirt is disclosed. The cleaning machine includes a powder dispenser attachable to a vacuum cleaner. The... | 05/26/1981 |
| 4268936 | Apparatus for chopping strands A squirrel cage type long strand eliminator is provided intermediate the chopper and the collection region to eliminate undesirably long sections of strand from free falling discrete segments of strand as they are being formed from a continuous strand.... | 05/26/1981 |
| 4268937 | Metallic wire type card-clothing Interlocking metallic wire type card-clothing has a male section protruding from one flank of its rib and a female section formed in the other flank of the rib. The pitch width of the rib is not more than 1.65 millimeters (giving not less than 16 turns pe... | 05/26/1981 |
| 4268938 | Closure device for container A closure device or "zipper" particularly suitable for use with heavy water-tight containers to provide the secure joinder of an opening formed in the container and which can be readily separated to provide access to the interior of the enclosure and/or t... | 05/26/1981 |
| 4268939 | Slider for a large sized slide fastener A slider for a large sized slide fastener which includes a slider body of synthetic resin material and an integrally formed metal core member embedded in the slider body. The slider body includes opposed top and bottom planes and a neck portion connecting... | 05/26/1981 |
| 4268940 | Process and apparatus for crimping filament yarn Process and apparatus for controlling a filament pad in the stuffing chamber of a pneumatic crimper and for imparting an improved filament cohesion to the crimped filament yarn within said crimper.... | 05/26/1981 |
| 4268941 | Process for the continuous shrinking of yarns A process for the continuous shrinking of textiles includes initially exposing the material to the effect of a hot treatment liquid prior to placing the material on a curved support, and then, to obtain complete shrinkage, allowing the same treatment medi... | 05/26/1981 |
| 4268942 | Method and apparatus for manufacturing boxed encapsulated capacitors A boxed and encapsulated rolled metallized film capacitor susceptible to facile machine insertion is fabricated by cyclically advancing a lead frame 32 through a number of stations (36,37) whereat pairs of leads (24,26) of the lead frame are bent downward... | 05/26/1981 |
| 4268943 | Elastic roller for image forming An elastic roller composed of an axial core member and an elastic, liquid retentive layer of foam structure with uniform layer thickness surrounding the circumference of said core member, said elastic roller further comprising a flexible, liquid permeable... | 05/26/1981 |
| 4268944 | Tension control of fasteners There is disclosed a technique for tightening threaded fasteners in which values of offset torque, initial tension rate relative to angle, final tension rate relative to angle and other joint related factors are empirically determined by instrumenting a p... | 05/26/1981 |
| 4268945 | Method of assemblying a sealed structure A method of connecting a first shell to a second shell to establish a unitary sealed structure. A bead of a diaphragm assembly is connected to a first peripheral surface on the first shell to establish a first sealing surface and to define a first chamber... | 05/26/1981 |
| 4268946 | Method for finishing a plate The invention relates to method and apparatus for finishing a plate having projections extending therefrom comprising reinforcing the projections of the plate with a material which can be removed without damage to the projections, cutting the projections ... | 05/26/1981 |
| 4268947 | Method of securing a capillary tube passing through a wall Apparatus and a method for securing capillary tubes and other small diameter components within a refrigeration machine. A capillary plug button having a retainer plate in which various small diameter components may be secured has extending therefrom a pai... | 05/26/1981 |
| 4268948 | Parting device A tool for forming parting grooves in a flat, plastically deformable workpiece, especially a continuously cast steel slab in a manner which seals the internal porosity of the slab in the regions which become exposed upon division, has a working portion in... | 05/26/1981 |
| 4268949 | Tracing milling machine A tracing milling machine having a conventional tracing milling machine controller for controlling a servo movement of the machine is provided with a novel tracing command controller for automatically generating tracing commands to be supplied to the trac... | 05/26/1981 |
| 4268950 | Post-metal ion implant programmable MOS read only memory An MOS read only memory, or ROM, is formed by a process compatible with standard silicon gate manufacturing methods. The ROM is programmed either after the top level of device interconnects has been patterned and sintered, usually the last step in the sli... | 05/26/1981 |
| 4268951 | Submicron semiconductor devices Semiconductor devices with gate dimensions as small as 0.25 microns square have been fabricated using electron beam lithography and dry processing techniques. In particular, silicon gate, N-channel, metal-oxide-semiconductor (NMOS) field-effect-transistor... | 05/26/1981 |
| 4268952 | Method for fabricating self-aligned high resolution non planar devices employing low resolution registration A method is disclosed for fabricating structures having electrically conductive regions such as high resolution semiconductor device and circuit designs which require only low resolution alignment steps during fabrication. The method is used to fabricate ... | 05/26/1981 |
| 4268953 | Method of making an encapsulated magnetic-reed switch circuit element adapted for use in interconnected array The invention contemplates a unitary magnetically sensitive circuit element or network and a flexibly articulatable elongate assembly of a plurality of such elements or networks, with electrical interconnection of the same, such assembly being inherently ... | 05/26/1981 |
| 4268954 | Method of making non-inductive cylindrical thin film resistor A thin film, cylindrical resistor is disclosed which exhibits non-inductive characteristics and which may be fabricated easily and economically. A cylindrical insulative substrate is provided with electrically conductive termination bands and a thin coati... | 05/26/1981 |
| 4268955 | Contact insertion and removal tool A manually operable tool for inserting or removing contacts into or from electrical connectors, having an elongated handle housing with a spring-loaded longitudinally slidable member therein, the forward extremities of both the slidable member and handle ... | 05/26/1981 |
| 4268956 | Method of fabricating an interconnection cable A flexible connector cable for providing high density and reliable electrical interconnections between printed circuit boards or any other surfaces having conductive paths that need connection to conductive paths on adjacent surfaces. The connector cable ... | 05/26/1981 |
