1
Robert D Widergren, Wen Hsiung Chen, Stanley C Fralick, Andrew G Tescher: Digital video compression system and methods utilizing scene adaptive coding with rate buffer feedback. Compression Labs, David B Harrison, November 24, 1981: US04302775 (420 worldwide citation)

A digital video compression system and its methods for compressing digitalized video signals in real time at rates up to NTSC color broadcast rates are disclosed. The system compressor receives digitalized video frames divided into subframes, performs in a single pass a spatial domain to transform d ...


2
Roland Dore, Gilbert Drouin: Deformable high energy storage tension spring. Ecole Polythechnique, Fishman and Van Kirk, November 24, 1981: US04301551 (219 worldwide citation)

A tension spring capable of large elastic deformation and having a high resistance to breakage and particularly, but not exclusively, for use as an artificial prosthetic ligament. The spring comprises an elongate elastic core having a low modulus of elasticity and defining opposed ends. A tensionabl ...


3
Frederick J Karol, George L Goeke, Burkhard E Wagner, William A Fraser, Robert J Jorgensen, Nils Friis: Preparation of ethylene copolymers in fluid bed reactor. Union Carbide Corporation, John S Piscitello, November 24, 1981: US04302566 (192 worldwide citation)

Ethylene copolymers having a density of .gtoreq.0.91 to .ltoreq.0.96 and a melt flow ratio of .gtoreq.22 to .ltoreq.32 are readily produced in a low pressure gas phase process at a productivity of .gtoreq.50,000 pounds of polymer per pound of Ti with a particulate catalyst diluted with an inert carr ...


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Takatoshi Ikeda, Shuichi Hirano, Yasuyuki Kozima: Facsimile system. Hitachi, Craig and Antonelli, November 24, 1981: US04302781 (156 worldwide citation)

A facsimile apparatus of analog type is disclosed, in which, in order to shorten the transmission time, continuous white lines of the white background of the original are read variably in number during each scanning line period. The information thus read is transmitted to the receiver in synchronism ...


6
Eric J Gargini: Wire broadcasting system with subscriber controlled switched program selection. Communications Patents, Laurence R Brown, November 24, 1981: US04302771 (146 worldwide citation)

A wired broadcasting system comprising a central station at which a plurality of television signals are made available, a plurality of exchanges connected to the central station by a plurality of trunk cables on which the television signals are broadcast, and a plurality of subscriber units each con ...


7
Willard G Bouricius, Paul E Stuckert: Method and apparatus for secure message transmission for use in electronic funds transfer systems. International Business Machines Corporation, Roy R Schlemmer Jr, November 24, 1981: US04302810 (145 worldwide citation)

An electronic funds transfer system wherein it is required that a bank be reasonably guaranteed that the two parties to a retail transaction (i.e., a person and a retailer) agree on the transaction before the funds transfer takes place. The message including the transaction information is encrypted ...


8
Stanley Poler: Cauterizing tool for ophthalmological surgery. Hopgood Calimafde Kalil Blaustein & Judlowe, November 24, 1981: US04301802 (141 worldwide citation)

The invention contemplates a cauterizing tool in which the localized working surface of a cauterizing electrode is at an offset end of an elongate tubular body which may be of hypodermic-needle proportions and which is adapted for syringe connection to enable manipulation and irrigation of the regio ...


9
Geoffrey M Wahl, George R Stark: Transfer and detection of nucleic acids. The Board of Trustees of Leland Stanford Junior University, Bertram I Rowland, November 24, 1981: US04302204 (133 worldwide citation)

Improvements in the transfer and detection of separated nucleic acids, both RNA and DNA, are provided. For analysis of large DNA, the molecular weight segregated fractions of DNA are depurinated and fragmented to provide fractions having less than about 2 kb as single strands. With both RNA and DNA, ...


10
Ryoichi Sado, Takekuni Okamoto, Shigeru Matumoto: Key-board switch unit. Shin Etsu Polymer, Hopgood Calimafde Kalil Blaustein & Judlowe, November 24, 1981: US04302648 (131 worldwide citation)

The invention provides a key-board switch unit used, for example, in pocketable electronic calculators comprising a base plate having at least one pair of switch electrodes and a covering pad made of an insulating rubber and provided with at least one contact member made of an electroconductive rubb ...



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