C Hunter Shelden, Gilbert D McCann: Stereotactic method and apparatus for locating and treating or removing lesions. Freilich Hornbaker Rosen & Fernandez, January 27, 1987: US04638798 (371 worldwide citation)

A stereotactic method and apparatus for treating a region of a patient's body defines points in the region using a three-dimensional coordinate system with reference to a ring attached to the patient for establishing a reference point for the three-dimensional coordinate system at the center of the ...

Burton L Greenberg: Method and apparatus for the automatic identification and verification of television broadcast programs. Davis Hoxie Faithfull & Hapgood, January 27, 1987: US04639779 (292 worldwide citation)

An improved method and apparatus for identifying and verifying the proper airing of television broadcast programs wherein from the television broadcast, it can be assured that the programs were televised and received properly and aired at the scheduled time. The invention utilizes prerecorded or liv ...

Robert W Rand: Medical apparatus for inducing scar tissue formation in a body. Herb Boswell, January 27, 1987: US04638803 (238 worldwide citation)

An inflatable balloon capable of being delivered to a site within a body via a catheter or the like, includes on its surface a composition. The composition is capable of inducing the formation of a thrombosis followed by invasion of capillaries and fibroblasts to the thrombosis and subsequent scar f ...

William P Rympalski, James S Herstein, Roger L Ritenour: Electronic sketch pad. Harris Corporation, Antonelli Terry & Wands, January 27, 1987: US04639720 (230 worldwide citation)

A graphics input/output device contains a graphics input pad having an array of transparent capacitive pixels the capacitance characteristics of which are changed in response to the passing of a conductive-tipped stylus over the surface of the pad. This change in capacitance is sensed by sense buffe ...

Jack H Winters: Wireless PBX/LAN system with optimum combining. AT&T Bell Laboratories, Patrick E Roberts, Robert O Nimtz, January 27, 1987: US04639914 (176 worldwide citation)

A wireless PBX or LAN system is disclosed that allows multiple, simultaneous users per channel for communication between a base station and a plurality of remote terminals by a combination of adaptive signal processing arrays using optimum combining at the base station for interference suppression a ...

Nabil I Rizk, Charles L Stevens: Implantable electrophoretic pump for ionic drugs and associated methods. Nabil I Rizk, Arnold B Silverman, January 27, 1987: US04639244 (174 worldwide citation)

An implantable electrophoretic pump for ionic drugs and the method of using the same is provided. A reservoir is provided with a filler opening and a discharge opening. The discharge opening has a diffusion membrane and a pair of associated electrodes. A battery and electronic components provide for ...

Bodo Junge, Hans P Krause, Lutz Muller, Walter Puls: Antidiabetic 3,4,5-trihydroxypiperidines. Bayer Aktiengesellschaft, Sprung Horn Kramer & Woods, January 27, 1987: US04639436 (168 worldwide citation)

The invention includes certain 3,4,5-trihydroxypiperidine compounds, methods for their preparation, compositions containing said 3,4,5-trihydroxypiperidine compounds and methods for the use of said compounds and compositions.

Isamu Washizuka: Portable audio-visual electronic apparatus. Sharp Kabushiki Kaisha, Birch Stewart Kolasch & Birch, January 27, 1987: US04639225 (167 worldwide citation)

A portable general-purpose electronic apparatus which is characterized in that; a memory unit can be inserted into the housing via an inlet so that any desired display information memorized by the memory unit can be displayed on a screen display, and as a result, a variety of information can be conv ...

Lawrence R Young, Gregory J Sexton, Randal L Mullins, Brian D Bradley: Ink level detection system for ink jet printing apparatus. Eastman Kodak Company, John D Husser, January 27, 1987: US04639738 (140 worldwide citation)

The detection system includes a cartridge having a first detection port for detecting the pressure condition in the top portion of the cartridge and a second detection port and tube for detecting the pressure condition in a bottom portion of the cartridge. The cooperative printer structure couples t ...

Andrew Heilveil, Jerry R VanAken, Karl M Guttag, Donald J Redwine, Raymond Pinkham, Mark F Novak: Video display system using memory with parallel and serial access employing selectable cascaded serial shift registers. Texas Instruments Incorporated, John G Graham, Rodney M Anderson, January 27, 1987: US04639890 (134 worldwide citation)

In a computer system, an improved memory circuit is provided for accomodating video display circuits with CRT screens having different resolutions. The memory circuit includes a bit-mapped RAM unit or chip having sufficient cells to accomodate any CRT screen intended to be used, and it further inclu ...