1
John P Hanton, Harley A Leach: Electronic livestock identification system. Cooper Dunham Clark Griffin & Moran, April 21, 1981: US04262632 (173 worldwide citation)

An electronic identification system for livestock, particularly adapted to tagging ruminating animals, such as cattle and sheep, comprising a transmitter capsule which is implantable in the animal and precoded to broadcast a series of binary coded electric pulses peculiar to the animal. An associate ...


2
Donald D Schwellenbach: LaValle D Ptak, April 21, 1981: US04262549 (170 worldwide citation)

A variable mechanical vibrator includes a first eccentric weight fixed to a rotatably mounted shaft. A second eccentric weight is rotatably mounted on the shaft, and the two weights are rotated together under control of mating engagement abutments, one carried by the shaft and one carried by or comp ...


3
Ronald M Kubacki: Thin film deposition apparatus using an RF glow discharge. Thomas E Schatzel, April 21, 1981: US04262631 (166 worldwide citation)

An RF plasma deposition apparatus for depositing a film of material on substrates positioned in a vertical plane and electrically "floating" within the glow discharge. For deposition of silicon nitride films, the apparatus is adapted to introduce silane gas in a substantially uniform and laminar flo ...


4
Vernon A Hagg, Phillip W Trask: Sole body for footwear. Wicks & Nemer, April 21, 1981: US04262433 (140 worldwide citation)

A sole body for footwear including a longitudinally extending body having an upturned fore part extending rearwardly from the front end of the sole body which terminates in a front groove extending transversely of and in the bottom thereof. A central rocker portion is formed on the bottom of the sol ...


5
Jacob E Thomas: High density matrix code. NCR Corporation, J T Cavender, Wilbert Hawk Jr, George J Muckenthaler, April 21, 1981: US04263504 (125 worldwide citation)

A machine-readable matrix-type code has either repeated or non-repeated dot patterns in one direction representing digital characters which are read by a sensor moved in a direction which is generally normal to the patterns. The patterns of the code may be formed in a manner wherein the sensor views ...


6
Khosrow Jamshidi: Biopsy needle having integral stylet locking device. Orrin M Haugen, Thomas J Nikolai, April 21, 1981: US04262676 (123 worldwide citation)

An elongated hollow biopsy needle assembly which includes a cannula, a stylet arranged to be received within the cannula, a finger-gripping means, and coupling means for orienting the stylet within the cannula and for releasably securing both the cannula and the stylet to the finger-gripping means. ...


7
Walter L Roalstad, Ernest W Yeager: Intramedullary compression device. Harvey B Jacobson, April 21, 1981: US04262665 (106 worldwide citation)

A first plurality of concavo-convex disks are slidably received on one end of a bolt and inserted in the medullary cavity of one section of a fractured bone. The concave side of each disk is oriented toward the fracture site. A second group of concavo-convex disks are mounted on a threaded collar an ...


8
Bernhardt F Giebeler: Kelly valve. Bernhardt & Frederick Co, Lyon & Lyon, April 21, 1981: US04262693 (97 worldwide citation)

A valve adapted for installation at the lower end of a drilling kelly for closing the bore of the kelly when adding a section of drill pipe so that the mud content of the kelly is not discharged onto the derrick floor; the valve also being adapted with minimum change in parts, to be inverted and ins ...


9
Bill Norman: Weight-cushioning device for handles and method of constructing same. Gausewitz Carr Rothenberg & Edwards, April 21, 1981: US04262385 (97 worldwide citation)

An elongated, generally hourglass shaped weight-cushioning device for attachment to the handles of a bowling ball carrying bag has an outer layer of relatively thin vinyl material and a somewhat thicker inner layer of foam padding material. The outer layer has a shape substantially identical to but ...


10
Robert W Seymour, James C Weaver, Benny W Wright: Stampable reinforced thermoplastic polyester sheets. Eastman Kodak Company, Malcolm G Dunn, Daniel B Reece III, April 21, 1981: US04263364 (90 worldwide citation)

The object of the invention is to provide a stampable sheet of reinforced thermoplastic material, the sheet being composed of a plurality of layers of polyester material and a plurality of layers of reinforcing material integrally formed together, the central layer or layers of polyester material be ...



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