21
Herman B Fleishman: Tactical nagivation and communication system. The United States of America represented by the Secretary of the Navy, R S Sciascia, Henry Hansen, November 4, 1980: US04232313 (93 worldwide citation)

Method and apparatus are provided for the tactical nagivation and communiion of a community of aircraft. Each of the aircraft in the community is provided with an inertial navigation system capable of providing accurate short term navigational information and a time synchronized ranging system capab ...


22
Roger Dechenne, Guy Hubert: Hollow article made of an oriented thermoplastic. Solvay & Cie, Spencer & Kaye, November 4, 1980: US04231483 (87 worldwide citation)

A hollow article made of an oriented thermoplastic having improved resistance to lateral impact, and provided with a base composed, successively, of a peripheral arched profile, a substantially plane annular zone and a recessed central part in the shape of a dome, the diameter of the central part be ...


23
Charles C Freeny Jr: Quantized hyperbolic and inverse hyperbolic object location system. Dunlap Codding & McCarthy, November 4, 1980: US04232317 (80 worldwide citation)

An object location system wherein signals are transmitted or received via more than one transmit station and wherein the objects receive signals from the transmit stations or transmit signals for reception by the treatment stations within a data base region and wherein location coordinates are estab ...


24
Tamaki Kaneko, Seiichi Miyakawa, Toyokazu Satomi, Yutaka Koizumi, Isao Nakamura, Yasuhiro Tabata: Auto document feeder for use with duplex copying machine. Ricoh Company, McGlew and Tuttle, November 4, 1980: US04231561 (80 worldwide citation)

The auto document feeder is for use with duplex copying machines, and is capable of inverting duplex sheet originals, having images on both surfaces, automatically and feeding the originals to an exposure station automatically. The feeder comprises trays for stacking a plurality of sheet originals t ...


25
Joseph F Tittl: Beach towel for use with a pillow. W Thad Adams III, November 4, 1980: US04231125 (79 worldwide citation)

A beach towel or the like for use with a pillow, and characterized by simplicity and economy of construction, and the use of elements substantially impervious to corrosion by salt and damage from sand. The beach towel comprises an elongate, substantially rectangular fabric piece defining opposing, l ...


26
Parker C Smiley: Spring diaphragm. Physics International Company, Robert R Tipton, November 4, 1980: US04231287 (77 worldwide citation)

A high pressure diaphragm for use with an electroexpansive material utilizes a generally planar central member, a generally outer flange-engaging member, and an annular ring member, which can have a frusto-conical shape, having its outer edge flexibly connected to the inner edge of the flange-engagi ...


27
Jean Paul Randin: Electro-optic device. Ebauches, Silverman Cass & Singer, November 4, 1980: US04231641 (76 worldwide citation)

An electro-optic device comprising a transparent conductive layer, an electrochromic layer applied on the said transparent layer, these two first elements constituting together a first electrode, a counter-electrode maintained at distance from the said first electrode, and an electrolyte ensuring an ...


28
Robert Q Riley, David L Carey: Exercise machine with spring-cam arrangement for equalizing the force required through the exercise stroke. William H Drummond, November 4, 1980: US04231568 (74 worldwide citation)

An exercise machine with a user-actuated force-applying member utilizes a spring to resist the physical force applied by the user. The physical force is applied to the spring through a cam arrangement which equalizes the force required throughout the exercise stroke.


29
Jerry L Grimes: Gas delivery face shield. Seiler & Quirk, November 4, 1980: US04231363 (73 worldwide citation)

A device for delivering gas to a patient comprises a unitary mask member for overlying the patient's nose and mouth and having an upper peripheral surface for lying in sealing engagement against the nose and cheeks, and a lower peripheral surface contiguous therewith disposed outwardly from the face ...


30
Robert J Kurtz, Spencer J Silverstein: Pulsatile blood pumping apparatus and method. Howmedica Incorporated, Cushman Darby & Cushman, November 4, 1980: US04231354 (72 worldwide citation)

An intracorporeal, extracorporeal, cardiac assist, perfusion device or other pulsatile blood pumping system for circulating blood within living tissue under automatic control. Plural physiologic parameters of the tissue are monitored and utilized to control plural operating parameters of the pump du ...