1
Messman Roger L, Becker Karl E, Messman Henry C: Method of recovering hydrocarbons by in situ combustion. August 17, 1971: US3599714 (267 worldwide citation)

The invention provides a method for recovering hydrocarbons from a geological formation having combustible organic material. A passageway is established from a point in the formation, through same, and to the surface of the ground. The combustible organic material is ignited. Oxygen-containing gas i ...


2
Churchill Donald, Cartmell James V: Display device containing minute droplets of cholesteric liquid crystals in a substantially continuous polymeric matrix. The National Cash Register Company, August 17, 1971: US3600060 (146 worldwide citation)

This disclosure is directed to articles of manufacture, chiefly display devices, containing minute 'naked' droplets or inclusions of cholesteric liquid crystal material in a substantially continuous polymeric matrix, said liquid crystal material changing color or shade of color not only upon applica ...


3
Leposavic Wayne V: Multiple switch construction. Lematex Corporation, August 17, 1971: US3600528 (118 worldwide citation)

Multiple switches produced as a flat panel embodying the basic principle of laminates of electrical conductors in desired patterns assembled as stratifications in close proximity but separated by spacers and covered by resilient material facilitating momentary pushbutton operation of companion switc ...


4
Hinterstocker Adolf: Coin testing device for comparing coin to be tested with a standard coin. August 17, 1971: US3599771 (79 worldwide citation)

The genuineness of a coin is determined by comparison of the 'test' coin with a 'standard' coin which are interposed between a primary coil and first and second secondary coils respectively of a transformer, the primary coil being supplied with an AC signal while the secondary coils are connected in ...


5
Dvorak Miloslav, Lepsi Arnost: Involute pump. Leybold Heraeus Verwaltung, August 17, 1971: US3600114 (74 worldwide citation)

A fluid pump or motor is formed of two disks which are mounted parallel to each other and for rotation relative to each other. The opposed surfaces of the disks include substantially plane portions and projections extending from the substantially plane portions and interengaging with each other. The ...


6
White Colin Graham: Phase difference detectors. The Marconi Company, August 17, 1971: US3600690 (68 worldwide citation)

This invention provides a phase difference detector for detecting when the phase relationship between two waves changes from a predetermined relationship by a predetermined amount. Delay means are provided for relatively delaying the two waves to an extend dependent upon the lead or lag tolerance pe ...


7
Duncan David M: Bipolar and field-effect transistor using polycrystalline epitaxial deposited silicon. Fairchild Camera and Instrument Corporation, August 17, 1971: US3600651 (68 worldwide citation)

Adjacent layers of single crystalline and polycrystalline semiconductor material are located upon a semiconductor substrate. The single crystalline layer provides for the active regions of a semiconductor device while the adjacent polycrystalline layers provide for lateral contacts to the active reg ...


8
Spotz Donald R: Portable suction pump system. Borg Warner Corporation, August 17, 1971: US3599639 (61 worldwide citation)

A portable suction or vacuum pump system especially for medical use, which meets the requirements of pharyngeal and tracheal suctioning (high suction, low flow), gastric decompression or stomach pumping (moderate suction, low flow and cyclic operation), and pleural suctioning (low suction, high flow ...


9
Larson Phyllis M: Disposable undergarment with absorption pad. August 17, 1971: US3599640 (60 worldwide citation)

A disposable waist-supported garment to be worn next to the skin, e.g., panty, bikini, crotch guard, men's supporter, the garment optionally including an integral absorbent crotch pad. The garment is made of a nonwoven (e.g., paper or paperlike) material with a sufficient amount of thermoplastic mat ...


10
Jones James H, Weaver Ervin E: Exhaust gas purification. Ford Motor Company, August 17, 1971: US3599427 (56 worldwide citation)

This invention is concerned with a process for the effective removal of carbon monoxide hydrocarbons and the oxides of nitrogen from the exhaust stream of mobile internal combustion engines. This purification is accomplished by passing the exhaust gas from an engine operating at near the stoichiomet ...