51
Michael L Schuman: Chlorination module for cartridge filter unit. Rainbow Lifegard Products, Christie Parker & Hale, October 25, 1988: US04780197 (69 worldwide citation)

A filter and chemical dispenser combination for filtering and chemically treating water to be added to a body of water includes a liquid inlet, a liquid outlet, and a flow passage between the inlet and the outlet. A filter element is positioned in the flow passage between the inlet and the outlet ex ...


52
Eigo Kawakami, Yukichi Niwa, Yasuo Ogino, Minoru Yoshii, Shigeyuki Suda, Mitsutoshi Ohwada: Anti-vibration imaging device. Canon Kabushiki Kaisha, Fitzpatrick Cella Harper & Scinto, October 25, 1988: US04780739 (67 worldwide citation)

An imaging device has detection means for detecting an image vibration of the imaging device and drive means for driving at least one of a photoelectric conversion device for converting a light of an object transmitted through a lens system of the imaging device to an electrical signal and the imagi ...


53
Irwin Friedman: Single mirror projection optical system. The Perkin Elmer Corporation, Thomas P Murphy, Edwin T Grimes, Francis L Masselle, October 25, 1988: US04779966 (65 worldwide citation)

A well corrected ring field catadioptric optical system utilizing refractive elements of the same glass type. A virtual relay corrected for axial and lateral primary color incorporates an air-surface doublet and two field lenses to correct for field aberrations to provide a well corrected ring field ...


54
Richard K Frazier: Tactile stimulator. Ronald P Kananen, October 25, 1988: US04779615 (64 worldwide citation)

A tactile stimulator for causing information from a remote input source either manually or automatically to be transmitted or transposed through a converter such as a transducer or computer to an output driver to provide tactile stimulation to a user. In an preferred embodiment, a preprogrammed sour ...


55
Francis V Hill: Method of making polyimide foam structures of controlled density and increased rigidity. Frank D Gilliam, October 25, 1988: US04780167 (63 worldwide citation)

A method of making structural panels having a controlled density polyimide core, generally with at least one face sheet. An open cell polyimide foam panel is impregnated with a liquid polyimide precursor, compressed to squeeze out all but a desired quantity of the polyimide precursor and dried. One ...


56
John J Sauk, Craig L Van Kampen: Physically stable composition and method of use thereof for osseous repair. The University of Maryland at Baltimore, Minnesota Mining and Manufacturing, Merchant Gould Smith Edell Welter & Schmidt, October 25, 1988: US04780450 (63 worldwide citation)

A composition for osseous repair which is prepared by a process comprising mixing a particulate polycrystalline calcium phosphate ceramic, a phosphophoryn calcium salt and type I collagen, preferably in a weight ratio of ceramic:calcium salt:collagen of about 775-15:3-0.1:1, to yield a solid porous ...


57
Bernard P Breen, James E Gabrielson, Howard B Lange: Apparatus and method of reducing nitrogen oxide emissions. Consolidated Natural Gas Service Company, Lynn J Alstadt, Buchanan Ingersoll, October 25, 1988: US04779545 (62 worldwide citation)

An apparatus and method for reducing nitrogen oxide emissions from furnace flue gas is provided in which a pulse generator introduces natural gas, or other fluid fuel which has little or no fixed nitrogen, into the upper portion of the furnace. The fuel pulse reacts with the nitrogen oxide in the fl ...


58
Sidky D Rizk, Harry W S Hsieh, John J Prendergast Sr: High speed cure sealant. Essex Specialty Products, Curtis Morris & Safford, October 25, 1988: US04780520 (62 worldwide citation)

A moisture curable sealant having good stability in the absence of moisture and a rapid cure rate in the sole presence of atmospheric moisture, the sealant containing a polyurethane prepolymer having an isocyanate functionality between 2.3 and 3.0, an isocyanate content of about 1-4 percent by weigh ...


59
Minoru Fukuda, Hideo Yamamoto, Isao Isa: Solid electrolytic capacitor. The Japan Carlit, Frishauf Holtz Goodman & Woodward, October 25, 1988: US04780796 (61 worldwide citation)

A solid electrolytic capacitor having excellent characteristics in terms of both electrical properties and thermal stability is obtained by employing a solid electrolyte comprising both an electrically conductive polymer layer (I) formed by a chemical oxidation method and an electrically conductive ...


60
Luc Weynachter, Vincent Corcoles: Solid-state trip unit of an electrical circuit breaker with contact wear indicator. Merlin Gerin, Parkhurst Oliff & Berridge, October 25, 1988: US04780786 (61 worldwide citation)

A digital solid-state trip unit of an electrical circuit breaker is equipped with an electrical contact wear indicator enabling the degree of wear of these contacts to be known. Each time the circuit breaker performs a break, the microprocessor determines a contact wear value, in terms of the maximu ...