1
Papadopoulos Michael N, Ueber Russell C: Method of producing oil from an oil shale formation containing nahcolite and dawsonite. Shell Oil Company, October 24, 1972: US3700280 (230 worldwide citation)

A new and improved method of recovering hydrocarbons and dawsonite decomposition products from a subterranean oil shale formation containing substantial amounts of nahcolite and dawsonite comprising penetrating said formation with at least one well borehole and forming a cavern therein. A hot fluid ...


2
Anderson Robert K: Electrosurgical generator. Valleylab, October 24, 1972: US3699967 (216 worldwide citation)

An isolated output electrosurgical generator suitable for generating cutting and coagulation electrosurgical currents is described. The electrosurgical generator using a single power stage generates three distinct and independent currents--a coagulation current for hemostasis or tissue destruction; ...


3
Allen William Glenn: Method for implanting natural or synthetic fibers into living tissue. October 24, 1972: US3699969 (170 worldwide citation)

A method for implanting natural or synthetic fibers directly into the skin, particularly the scalp. The method is effected by the use of a concentric dual needle arrangement that comprises a first, outer needle and a second, inner needle slideably mounted within the outer needle. The fibrous materia ...


4
Bingham Wallace Karl: Retroreflective microspheres having a dielectric mirror on a portion of their surface and retroreflective constructions containing such microspheres. Minnesota Mining and Manufacturing Company, October 24, 1972: US3700305 (143 worldwide citation)

Retroreflective constructions containing microspheres with adjacent dielectric mirrors. Also microspheres having a plurality of coatings on a portion of their surface to form a dielectric mirror thereon.This invention relates to novel retroreflective elements and to retroreflective constructions inc ...


5
Hesse deceased Holger, Ruben Henning M: Valve arrangement, especially for use in anaesthetic gas supply systems. October 24, 1972: US3700000 (128 worldwide citation)

A blow-off valve which vents excess gas to the atmosphere when the pressure in a gas circulation system, such as an anaesthetic supply system, exceeds a certain value, as occurs when the patient breathes out, is improved by providing a system to close the valve when the pressure exceeds a still high ...


6
Kitrilakis Sotiris, Robinson Thomas C: Percutaneous lead device. Tecna Corporation, October 24, 1972: US3699956 (122 worldwide citation)

A percutaneous lead device including an element for preventing bacterial infection caused by implanting the lead through the skin. This element extends below and along the skin surface and includes an antibacterial fluid reservoir coated with a diffusion-controlling layer which maintains the desired ...


7
Blasbalg Herman L, Hayase Joshua Y, Crutchfield Jr Richard C, Najjar Hann F: Adaptive digital communication system. International Business Machines Corporation, October 24, 1972: US3700820 (108 worldwide citation)

An adaptive digital multiplexer including a multiplex format computer, a time slot generator, and a combiner. The format computer determines the number of time slots required within a time frame and assigns input signals to time slots according to the information rate and priority of each input sign ...


8
Acker Norbert K: Device for machine reading of information without manipulation of the information carrier. Scanner, October 24, 1972: US3701098 (106 worldwide citation)

A system is disclosed for reading digitally expressable information from randomly positioned and randomly oriented data fields by detecting presence of a data field in a search field through imaging the search field onto a recognition device and changing position, distortion and magnification of the ...


9
Landman Dirk: Hinge type circuit board connector block. Berg Electronics, October 24, 1972: US3701071 (96 worldwide citation)

A connector block in which a daughter type circuit board is secured to a mother board by a hinge connection and then rotated about the hinge connection so that contact pads on the daughter board are brought into engagement with contacts on the mother board to form electrical connections therewith. L ...


10
Lee Don N, McMennamin Roy B: Sample and hold circuit with switching isolation. Computer Test Corporation, October 24, 1972: US3700998 (93 worldwide citation)

Sampling an unknown signal only for a single time interval and holding the resultant sampled signal value with these operations being substantially independent of frequency. A discharge circuit in shunt with the storage capacitor comprises a diode bridge having four matched diodes. A pair of common ...