Chester Y Sakura Jr: Anastomosis device and method. Woodard Weikart Emhardt & Naughton, July 29, 1980: US04214587 (392 worldwide citation)

A preferred embodiment of the anastomosis device comprises a cylindrical, radially resilient spring upon which is attached a number of outwardly extending barbs. The radial spring action significantly simplifies the anastomosis procedure and in addition allows the mended portion of the blood vessel ...

John Zebelean: Metal golf driver and method of making same. Pro Patterns, Freilich Hornbaker Wasserman Rosen & Fernandez, July 29, 1980: US04214754 (326 worldwide citation)

An all metal hollow golf driver is formed by casting a first main part from metal, e.g., stainless steel, in the shape of practically a complete golf driver, except for an opening in one side of the driver body, e.g, the sole side. A second cast part fits within the opening and is weldable thereto t ...


Richard A Davidson: Subscriber-limited reception television broadcast security encoder-decoder system. Feature Film Services, Robert L Lindgren, Lloyd L Zickert, Joseph A Yanny, July 29, 1980: US04215366 (175 worldwide citation)

A method and apparatus for encoding and decoding of standard television signals are provided for enabling reception thereof in an intelligible manner only by authorized subscribers. The scrambling of the video signals is effected by inversion of the video signals of some horizontal scan lines on a p ...

Lawrence E Forget, Robert A Gdula, Joseph C Hollis: Selective reactive ion etching of polysilicon against SiO.sub.2 utilizing SF.sub.6 -Cl.sub.2 -inert gas etchant. International Business Machines Corporation, Wesley DeBruin, July 29, 1980: US04214946 (164 worldwide citation)

Disclosed is an improved Reactive Ion Etch (RIE) technique for etching polysilicon or single crystal silicon as must be done in Very Large Scale Integration (VLSI) using silicon technology. It teaches the use of an etch gas that consists of a mixture of sulfur hexafluoride (SF.sub.6) and chlorine (C ...

Yukihiko Iijima: Digital transmission system for television video signals. Nippon Electric Company, Sughrue Rothwell Mion Zinn and Macpeak, July 29, 1980: US04215369 (157 worldwide citation)

A digital transmission system for television video signals of the type which comprises a transmitter and a receiver, the transmitter having a plurality of input terminals for receiving respective television video signals to be transmitted, a plurality of encoding units for encoding the respective vi ...

Hobe Schroeder, David A Palmer: Formation, purification and recovery of phthalic anhydride. Standard Oil Company, Fred R Ahlers, William T McClain, William H Magidson, July 29, 1980: US04215051 (149 worldwide citation)

Phthalic anhydride of commercially acceptable quality is recovered in high (94-96%) yields from a mixture containing, on a weight basis, from 70 to 90% o-phthalic acid, 1.5 to 20% water, 0.3 up to 13% benzoic acid, 0.2 up to 2% o-toluic acid, 0.2 to 1% 2-carboxybenzaldehyde, 0.1 up to 2% phthalide a ...

Joseph L Bernier, Peter W Kamber: Real time performance monitoring of gas turbine engines. The Boeing Company, Christensen O Connor Johnson & Kindness, July 29, 1980: US04215412 (146 worldwide citation)

A real-time gas turbine engine monitoring system is disclosed which includes a digital processor that utilizes a set of scalar coefficients and the current value of various engine operating parameters to predict the current value of a set of engine performance parameters. The actual values of these ...

Richard J Lawrance: Low cost bipolar current collector-separator for electrochemical cells. General Electric Company, I David Blumenfeld, July 29, 1980: US04214969 (145 worldwide citation)

A bipolar current collector-separator for electrochemical cells consists of a molded aggregate of electro-conductive graphite and a thermoplastic fluoropolymer combined in a weight ratio of 2.5:1 to 16:1. The bulk resistivity of such a molded bipolar current collector-separator is less than 4.times. ...

Richard J Hovey, Nori Y C Chu, Peter G Piusz, Charles H Fuchsman: Photochromic compounds. American Optical Corporation, Jeremiah J Duggan, Alan H Spencer, Stephen A Schneeberger, July 29, 1980: US04215010 (145 worldwide citation)

Photochromic compounds of the formula ##STR1## wherein one of R.sub.1 and R.sub.2 is halogen or lower alkoxy, and the other is hydrogen, and R.sub.3 and R.sub.4 are hydrogen, lower alkyl, lower alkoxy, or halogen and their use in lenses are disclosed.