1
Harold K Dunn: Orthopedic appliance. M Reid Russell, September 15, 1981: US04289123 (353 worldwide citation)

The present invention in an improved orthopedic appliance is for attachment in supporting engagement to a patient's spine, during an anterior surgical procedure thereof. The installed appliance provides for decompression of the contents of the spinal canal and/or is to obtain sufficient fusion mass ...


2
Robert G Rothfuss: Cut-through backup washer for the scalpel of an intraluminal surgical stapling instrument. Senco Products, Frost & Jacobs, September 15, 1981: US04289133 (339 worldwide citation)

A backup washer for the cylindrical scalpel of an intraluminal surgical stapling instrument of the type used to join tubular body organs. The washer comprises an annular member of semi-rigid material having an annular groove formed therein extending from the distal surface of the washer inwardly tow ...


3
Rolf Schnee, Franz Kraus, Friedrich Kiel, Helmut Kliem, Wolfgang Krick, Herbert Landgraf: Interactive cable television system. Heinrich Hertz Institut fur Nachrichtentechnik Berlin, Spencer & Kaye, September 15, 1981: US04290142 (235 worldwide citation)

An interactive cable television system for serving a plurality of user locations in a service area divided into a plurality of service regions, including a central office and a service network having a portion composed of parallel cables arranged in a tree pattern possessing a plurality of nodes rem ...


4
Daniel J Devlin: Integrated circuit package and lead frame. Plessey Incorporated, James J Burke II, September 15, 1981: US04289922 (182 worldwide citation)

An improved integrated circuit ceramic package meeting JEDEC-11 standards and having a nominal pin (lead) count of from 24 to 156. Control measures and assembly procedures referenced to the precise center of the die-attach area provide closer dimensional control and lead coplanarity which facilitate ...


5
Charles W Eichelberger, Robert J Wojnarowski: Capacitive touch entry apparatus having high degree of personal safety. General Electric Company, Geoffrey H Krauss, James C Davis, Marvin Snyder, September 15, 1981: US04290052 (176 worldwide citation)

A capacitive touch entry structure utilizes an array of at least one capacitive touch sensor fabricated upon a double-sided printed circuit board adhesively mounted upon a surface of a transparent insulative substrate. The substrate has sufficient thickness to safely insulate user personnel, contact ...


6
Roy E Anderson, Richard L Frey, James R Lewis: Electronic voting system. General Electric Company, Geoffrey H Krauss, James C Davis, Marvin Snyder, September 15, 1981: US04290141 (176 worldwide citation)

An electronic voting system includes a plurality of wireless response units, each response unit capable of transmitting several different digitally coded signals. Each of these digitally coded signals corresponds to the response of a person responding to a given stimulus. Each response unit transmit ...


7
Robert G Denkewalter, Jaroslav Kolc, William J Lukasavage: Macromolecular highly branched homogeneous compound based on lysine units. Allied Corporation, Robert A Harman, September 15, 1981: US04289872 (167 worldwide citation)

Formed from trifunctional units (M) having attached, to one of two terminal carbon atoms of an alkylene hydrocarbon diradical, the functional group A', and having attached, to the other terminal carbon atom, a different functional group B' reactive with A' to form a linkage AB; and having attached, ...


8
Hanon S Sinay: Medical diagnostic computer. Narvin H Kleinberg, Seymour A Scholnick, September 15, 1981: US04290114 (148 worldwide citation)

A computer-aided health care system for use by a paramedic. Findings taken from the patient by the paramedic are assigned numerical codes by use of preprinted forms. The paramedic uses a keyboard to enter the numerical codes into a fixed purpose computer. The computer compares the findings with a nu ...


9
Denny C Cormier: Method and apparatus for extracting systolic valvular events from heart sounds. Cormier Cardiac Systems, Howard L Rose, September 15, 1981: US04289141 (118 worldwide citation)

A non-invasive method and means for determining beat-by-beat assessments of a patient's cardiac performance by measuring the "pre-ejection phase" (PEP) and the "left ventricular ejection time" (LVET), the aforementioned phrases also being known as the "systolic time intervals" (STI) of the heart. Th ...


10
Sidney Pestka, Menachem Rubinstein: Protein purification process and product. Hoffmann La Roche, Jon S Saxe, George M Gould, Peter R Shearer, September 15, 1981: US04289690 (115 worldwide citation)

An improved process for purifying proteins, particularly proteins having molecular weights in excess of 12,000 involves novel applications of high performance liquid chromatography on a preparative scale to provide homogeneous end product in excellent yield. In an embodiment of the process, human in ...



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