1
Ronald L Rivest, Adi Shamir, Leonard M Adleman: Cryptographic communications system and method. Massachusetts Institute of Technology, Arthur A Smith Jr, Robert J Horn Jr, September 20, 1983: US04405829 (1106 worldwide citation)

A cryptographic communications system and method. The system includes a communications channel coupled to at least one terminal having an encoding device and to at least one terminal having a decoding device. A message-to-be-transferred is enciphered to ciphertext at the encoding terminal by first e ...


2
Constantin Cope: Apparatus and method for catheterization permitting use of a smaller gage needle. Cook Incorporated, Woodard Weikart Emhardt & Naughton, September 20, 1983: US04405314 (200 worldwide citation)

An introducing catheter for use with a pair of different diameter wire guides, the larger of which is a J-type wire guide, is provided in order to enlarge a tract to facilitate the passage of a drainage catheter through the tract. The introducing catheter includes an inwardly curved portion which li ...


3
Stanley P Knight: Television signal converting apparatus providing an on-screen tuning display. RCA Corporation, E M Whitacre, P J Rasmussen, C A Berard Jr, September 20, 1983: US04405946 (184 worldwide citation)

In a signal converting apparatus such as one including demodulation and remodulation apparatus for converting RF cable carriers to RF carriers having frequencies corresponding to broadcast frequencies, a character generator is coupled to the tuning selector to generate characters representative of t ...


4
Robert L Stephen, Carl Kablitz, Barry K Hanover, Stephen C Jacobsen, Jeffrey J Harrow: Subcutaneous peritoneal injection catheter. University of Utah Research Foundation, H Ross Workman, Allen R Jensen, Berne S Broadbent, September 20, 1983: US04405305 (175 worldwide citation)

A novel implantable, peritoneal injection catheter apparatus and method, the apparatus including an open top, fluid-receiving reservoir mounted to one end of a hollow stem and a penetrable membrane covering the open top of the receiving reservoir. The hollow stem is configurated to extend into the p ...


5
Karanam Balasubramanyam, Arthur L Ruoff: Ion beam exposure of (g-Ge.sub.x -Se.sub.1-x) inorganic resists. Cornell Research Foundation, Jones Tullar & Cooper, September 20, 1983: US04405710 (169 worldwide citation)

This invention relates to thin (g-Ge.sub.x -Se.sub.1--x) positive ionresists and thin (g-Ge.sub.x -Se.sub.1--x) with absorbed or chemically bonded silver as a negative ionresist, which when exposed to H.sup.+ ion beams and subsequently developed, for example by alkaline solutions, have a useful diff ...


6
Karl Friedrich Voges, Claus Haacke, Peter Heise: Coupling for medical apparatus tubes. Intermedicat, Merriam Marshall & Bicknell, September 20, 1983: US04405163 (160 worldwide citation)

A coupling for connecting the ends of medical apparatus tubes. The coupling has male and female conical mating elements on first and second end pieces. Each end piece is adapted to receive the end of a tube. The end pieces are locked together to prevent unintentional separation. Locking is achieved ...


7
David W Appel, Michael T Morman: Apparatus for forming nonwoven webs. Kimberly Clark Corporation, William D Herrick, R Jonathan Peters, Howard Olevsky, September 20, 1983: US04405297 (154 worldwide citation)

An improved method and apparatus for forming nonwoven webs by spinning filaments into a quench chamber where they are contacted with a quenching fluid, then utilizing the quench fluid to draw the filaments through a two-dimensional nozzle spanning the full machine width, and collecting the filaments ...


8
Robert S Block, John R Martin: Method and system for secure transmission and reception of video information, particularly for television. Telease, Burns Doane Swecker & Mathis, September 20, 1983: US04405942 (138 worldwide citation)

A method and a system for secure transmission and reception of a video signal wherein parts of the video signal arranged in a first predetermined sequence are delayed in relation to each other to form an encoded video signal having its parts rearranged in sequence relative to their positions in the ...


9
James R Sisley, Robert O Hickman: Figure-eight, dual-lumen catheter and method of using. Seed Berry Vernon & Baynham, September 20, 1983: US04405313 (134 worldwide citation)

An improved figure-8, dual-lumen catheter preferably includes substantially convex, smooth, smoothly curving fill-in portions at the point of entry to the vessel and the point of entry to the skin to virtually eliminate blood leakage from the vessel and to reduce bacterial passage into the patient a ...


10
Vithal J Rajadhyaksha: Penetration enhancers for transdermal drug delivery of systemic agents. Nelson Research & Development Company, Martin A Voet, September 20, 1983: US04405616 (127 worldwide citation)

In a method for administering systemically active agents including therapeutic agents through the skin or other body membranes of humans and animals typically in the form of a transdermal device or formulation, the improvement comprising the use therewith of an effective amount of a membrane penetra ...