Marshall R Urist: Bone morphogenetic protein process. The Regents of the University of California, Kenyon & Kenyon, October 13, 1981: US04294753 (251 worldwide citation)

The process of separating bone morphogenetic protein (BMP) from bone tissue comprising the steps of demineralizing bone tissue; treating the demineralized bone tissue under aqueous conditions with a water soluble neutral salt and a solubilizing agent for the BMP, the agent being selected from the gr ...

Robert M Tanner: Error-correcting coding system. Regents of the University of California, Poms Smith Lande & Rose, October 13, 1981: US04295218 (163 worldwide citation)

A method and apparatus for constructing long error-correcting codes from one or more shorter error-correcting codes, referred to as subcodes, and a bipartite graph. The graph specifies carefully chosen subsets of the digits of the new codes that must be codewords in one of the shorter subcodes. Lowe ...

A Seth Greenwald, Jack M Geiger, Nathaniel C Narten, Derek S Porritt, Steven P Combs, John J Brems: Method of suction lavage. Fay & Sharpe, October 13, 1981: US04294251 (154 worldwide citation)

The suction lavage system of this invention incorporates a pulsatile water lavage in combination with a suction system to improve the interface between a prosthesis, such as a hip replacement, and the interdigitating network of cancellous bone in which it is secured with acrylic cement. The water la ...

Mitsuko Asai: 20-O-Acylmaytansinoids. Takeda Chemical, Wegner & Bretschneider, October 13, 1981: US04294757 (133 worldwide citation)

Novel 20-demethoxy-20-acyloxymaytansinoids representable by the formula: ##STR1## [wherein X is chlorine or hydrogen; R.sub.1 is hydrogen or acyl group; R.sub.2 is acyl group] are produced from 20-demethoxy-20-hydroxymaytansinoids by means of acylation.

Bruce R Altschuler, John Taboada, Martin D Altschuler: Topographic comparator. Donald J Singer, Willard R Matthews, October 13, 1981: US04294544 (126 worldwide citation)

Three-dimensional (3-D) topographic data defining a remote surface in terms of the 3-D positions of M.times.N sample points on that surface may be obtained by (1) illuminating the scene with an array of M.times.N (simultaneous) laser beams, (2) sequencing the array of laser beams through a series of ...

Claude Bernard: Measuring head enabling the production of physiological measurement signals designed to be positioned on or in corporeal parts. Agence Nationale de Valorisation de la Recherche, Larson and Taylor, October 13, 1981: US04294258 (121 worldwide citation)

The measuring head enables the production of measuring signals relating to electrical activity and measuring signals relating to an ionic or physico-chemical activity, notably pH, and is designed to be located on or in parts of a living body, notably on the head of an unborn infant. It comprises an ...

Harold B Shutterly: Digital signal/noise ratio amplifier apparatus for a communication system. Westinghouse Electric, C M Lorin, October 13, 1981: US04295223 (116 worldwide citation)

The signal-to-noise ratio of a signal to be transmitted through a communication channel having an upper and lower limit in magnitude is sampled digitally and a common corrective factor for the deviations about the mean value of the signal is determined for amplifying the low portions of the signal w ...

Robert L Fuson: Bone plug inserting system. Zimmer USA, Margaret L Geringer, Richard H Brink, October 13, 1981: US04293962 (109 worldwide citation)

A device for plugging the medullary canal in joint replacement surgery which prevents the cement used for fixation from extending beyond that point where it is useful and which also creates a closed space to facilitate more complete cement filling of the femoral canal or other boney cavities is disc ...

Teruo Miyata: Collagen skin dressing. Edward J Mahler, October 13, 1981: US04294241 (109 worldwide citation)

Skin or wound dressings are prepared in gel or sheet form from enzyme-solubilized collagen and/or such chemically modified collagen. Improved sheet form dressing is prepared by tubular extrusion of such collagen gels.

Richard H Wildnauer, William T Humphries: Skin treating compositions. Johnson & Johnson, Irving Newman, October 13, 1981: US04294852 (105 worldwide citation)

The invention relates to a composition for treatment and control of excessively thickened, inflexible and scaly stratum corneum which often fissures into the dermis resulting in foci of bleeding and inflammation which are symptomatic of numerous altered skin conditions. More specifically, this inven ...