Milan Stolka, Damodar M Pai, John F Yanus: Imaging system with a diamine charge transport material in a polycarbonate resin. Xerox Corporation, Harvey M Brownroot, Peter H Kondo, James Paul O Sullivan, May 5, 1981: US04265990 (669 worldwide citation)

A photosensitive member having at least two electrically operative layers is disclosed. The first layer comprises a photoconductive layer which is capable of photogenerating holes and injecting photogenerated holes into a contiguous charge transport layer. The charge transport layer comprises a poly ...

Pieter Bonsen, Patrick S Wong, Felix Theeuwes: Method of delivering drug with aid of effervescent activity generated in environment of use. Alza Corporation, Paul L Sabatine, Edward L Mandell, Thomas E Ciotti, May 5, 1981: US04265874 (410 worldwide citation)

A method is disclosed for delivering a drug substantially free of rapid precipitation from an osmotic device. The osmotic device comprises a semipermeable wall surrounding a compartment, housing (1) a drug that exhibits limited solubility under neutral and acid conditions; and (2) a compound capable ...

John W Boretos, Norio Iriguchi: Method of making unitized three leaflet heart valve. The United States of America represented by the Department of Health Education and Welfare, Browdy and Neimark, May 5, 1981: US04265694 (382 worldwide citation)

An artificial heart valve comprising a semi-rigid framework having three projecting symmetrical struts and open axially therethrough, as well as a polyurethane elastomeric membrane attached to the struts and constituting three leaflets, is formed by molding the framework, including the base and stru ...

Lincoln F Elkins: Shale oil recovery. Standard Oil Company, John E Miller Jr, Herbert D Knudsen, Larry W Evans, May 5, 1981: US04265307 (250 worldwide citation)

In situ shale oil recovery from oil shale deposits using radio frequency energy as a heat generator is facilitated by rubblizing the shale oil deposits before application of radio frequency energy.

Peer M Portner, Jal S Jassawalla: Implantable infusion device. Andros Incorporated, Fitch Even Tabin Flannery & Welsh, May 5, 1981: US04265241 (236 worldwide citation)

Multiple embodiments of an implantable infusion device for delivering precisely regulated dosages of drugs are disclosed, each device including reservoir means for containing the drug, catheter means for delivering the drug to the body and an actuating means which is responsive to a signal applied e ...

Albert P Novak: Device to automatically screen incoming telephone calls, determine the identity of the caller and process the call accordingly. May 5, 1981: US04266098 (209 worldwide citation)

A device which monitors information contained in incoming telephone calls, and which, when attached to or combined with the circuitry of a telephone receiver, will automatically hold and display the identity of the caller while allowing the telephone bell to be rung only at certain times and/or for ...

Arnold D Scheller Jr, Thomas B Quigley: Curved drill attachment for bone drilling uses. May 5, 1981: US04265231 (196 worldwide citation)

An attachment for a drill has a cannula attachable to the drill motor and provided with a curved distal portion. A flexible shaft extends through the cannula with a burr connected to its distal end and with its proximal end connectable to the drill motor to be rotated thereby.

Rachel Goldstein, Peter E Kukanskis, John J Grunwald: Method and composition for continuous electroless copper deposition using a hypophosphite reducing agent in the presence of cobalt or nickel ions. MacDermid Incorporated, May 5, 1981: US04265943 (174 worldwide citation)

Electroless copper deposition solutions, and method of continuously electrolessly depositing copper onto a workpiece using these solutions, are disclosed. The solutions contain, in addition to water as the usual solvent, a soluble source of copper ions, a complexing agent or mixture of agents to mai ...

Yutaka Hirai, Toshiyuki Komatsu, Katsumi Nakagawa, Teruo Misumi, Tadaji Fukuda: Electrophotographic photosensitive member and process for production thereof. Canon Kabushiki Kaisha, Fitzpatrick Cella Harper & Scinto, May 5, 1981: US04265991 (159 worldwide citation)

A layer of amorphous silicon containing H, preferably 10-40 atomic %H, is used as a photoconductive layer for electrophotographic photosensitive member.

Robert G Bristol: Detection means for multiple capacitive sensing devices. Emhart, Robert F Meyer, David W Gomes, May 5, 1981: US04266144 (155 worldwide citation)

A detection circuit for detecting discrete states of multiple capacitive sensing devices in a continuum provides an output which is linearly variable with respect to changes in the states of the sensing devices. The circuit uses either a time interval measurement or voltage measurement which has a m ...