1
Terry Ruel C: Method of pyrolysis of coal in situ. In Situ Technology, Burton Crandell & Polumbus, December 9, 1975: US3924680 (253 worldwide citation)

A method of pyrolysis of coal in situ includes the steps of establishing a pair of passages between a sub-surface coal formation and the surface with the coal passages being adapted to separately remove liquids and gases from the coal formation, establishing a sump at the bottom of the passages whic ...


2
Droegemueller William, Eberhardt Jr Ralph N, Bingham Paul E: Cyrogenic bladder for necrosing tissue cells. Ferguson Jr Gerald J, Baker Joseph J, December 9, 1975: US3924628 (231 worldwide citation)

A method of, and apparatus for necrosing human tissue cells are described in which an expandable bladder filled with a fluid at a cyrogenic temperature is used to subject the entire area of tissue in contact with the bladder to temperatures sufficiently low to cause coagulation necrosis, whereby the ...


3
Wadhwani Romesh Tekchand, Pribadi Krishnahadi Sikun: Security system. Buell Blenko & Ziesenheim, December 9, 1975: US3925763 (210 worldwide citation)

A security alarm system for selectively detecting and signalling abnormal or emergency conditions, such as robbery, assault, fire, smoke, burglary, medical emergencies, etc. in a home, apartment, institution, plant or other place of business via digitally-coded messages, to a central data station. T ...


4
Holmen Reynold E, Nellessen Alfred H: Retro-reflective sheet material. Minnesota Mining and Manufacturing Company, Alexander Sell Steldt & DeLaHunt, December 9, 1975: US3924929 (156 worldwide citation)

A retro-reflective article having a retro-reflectivity of at least 400 candle power per foot candle per square foot when measured by a detector at an angle of 0.2 degrees divergence from an incident light beam and having a plurality of cube-corner retro-reflecting units and septa embossed on one sur ...


5
Cook William A, Osborne Thomas A: Apparatus and method for suprapubic catheterization. Cook, Woodard Weikart Emhardt & Naughton, December 9, 1975: US3924633 (143 worldwide citation)

Apparatus and method for suprapubic catheterization of a bladder when the catheter must remain in situ for a prolonged period. The catheter includes a flexible tension member secured near its distal end and passing through an opening in the catheter to its proximal end, whereby, when the member is d ...


6
Cook William A: Fiber glass reinforced catheter. Woodard Weikart Emhardt & Naughton, December 9, 1975: US3924632 (129 worldwide citation)

A catheter body for intubation of body organs and vessels. A plastic inner core has fiber glass bands spiralingly wrapped around its length. Each fiber glass band has individual strands of fiber glass laid in a side by side position. An outer plastic tube encloses the inner core and fiber glass band ...


7
Balamuth Lewis, Kuris Arthur, Karatjas Manuel: Ultrasonic dental and other instrument means and methods. Ultrasonic Systems, December 9, 1975: US3924335 (125 worldwide citation)

The invention discloses various ultrasonic dental equipment primarily adapted to be used for professional dental purposes as well as various dental procedures capable of being performed with the ultrasonic instrumentation. The ultrasonic dental system permits the user to selectively utilize a variet ...


8
Pfeifle Dieter: Thread storage device. SKF Kugellagerfabriken, December 9, 1975: US3924818 (101 worldwide citation)

The disclosure relates to apparatus and method for accumulating and feeding thread from a supply to a processing station, over a rotating cylindrical storage member. The thread is initially passed from the supply to the peripheral surface of the storage member on the peripheral edge of a conjointly ...


9
Cooper Earl A, Stephenson Roger C: Fire fighting system. G & H Technology, Sadler Dan R, December 9, 1975: US3924688 (94 worldwide citation)

A fire control system is disclosed herein having a plurality of hot wire electromechanical activators for non-explosive initiation of a corresponding plurality of fire extinguishers. The activators may be connected either in parallel for increased reliability or in series for increased ease in testi ...


10
Mancusi Jr Joseph J: Magnetic clamp. Altair, Littlepage Quaintance Murphy & Dobyns, December 9, 1975: US3924631 (93 worldwide citation)

Two movable members, one containing a permanent magnet and the other containing a non-magnetized but magnetically susceptable element are positioned such that there exists a magnetic force of attraction between the two members, thus closing a switch or valve. A control magnet having a greater streng ...



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