81
Taiji Nishizawa, Yutaka Tanaka: Picture signal processing system including spatio-temporal filter. Nippon Hoso Kyokai, Parkhurst & Oliff, November 5, 1985: US04551753 (56 worldwide citation)

A picture signal processing for converting a wideband high quality picture signal between interlace and sequential scanning systems is effected through a spatio-temporal filter based on multi-dimensional coordinates consisting of at least vertical frequency and temporal frequency axes. A passing reg ...


82
Francois Lindeperg: Solid-state instantaneous trip device for a current limiting circuit breaker. Merlin Gerin, Parkhurst & Oliff, March 22, 1988: US04733321 (55 worldwide citation)

An instantaneous solid-state trip device has two threshold values providing an upper and a lower tripping threshold. A current increase rate detector determines, when a short-circuit occurs, the prospective peak current value and, if the peak value corresponding to the electrodynamic withstand of th ...


83
Makoto Suzuki, Takeyuki Takagi: Key-holding structure of keyboard with curved operating surface of keys. Brother Kogyo Kabushiki Kaisha, Parkhurst & Oliff, April 5, 1988: US04735520 (55 worldwide citation)

A keyboard having a key-holder plate for movably supporting multiple keys of substantially the same shape and size in plural parallel rows, multiple switches disposed so as to correspond to the multiple keys and provide electrical outputs upon depression of the keys at their top faces, an upper casi ...


84
Hareo Hamada, Takashi Enokida, Tanetoshi Miura, Minoru Takahashi, Takashi Kuribayashi, Kinichiro Asami, Yoshitaka Oguri: Electronic noise attenuation system. Hitachi Plant Engineering & Construction, Tanetoshi Miura, Hareo Hamada, Parkhurst Oliff & Berridge, November 8, 1988: US04783817 (55 worldwide citation)

An electronic noise attenuation system for attenuation of non-steady noise occurring in a propagation passage such a duct line by conducting adaptive controls by use of a computer system including a digital filter therein. Sensing microphones M.sub.1, M.sub.2 are located in the propagation passage w ...


85
Takafumi Inagaki, Kazumasa Nakamura, Hiroharu Miyazaki: Automotive vehicle drive wheel slippage control device detecting vehicle road surface condition and modifying wheel braking operation according thereto. Toyota Jidosha Kabushiki Kaisha, Parkhurst & Oliff, March 29, 1988: US04733760 (54 worldwide citation)

An automotive vehicle driven wheel slippage control device is arranged such that the rotational speed of a driven vehicle wheel is determined. The presence of a condition of acceleration slippage is determined by utilizing as a parameter the rotational speed of the driven wheel. The value of a param ...


86
Trevor H Speak, John D Kernon, Derek A Roberts: Air sealing for turbomachines. Rolls-Royce, Parkhurst & Oliff, January 10, 1984: US04425079 (54 worldwide citation)

A stator assembly for a turbomachine having a sealing plate which co-operates with sealing members on an adjacent rotor assembly to form air seals. The sealing plate is provided with a thermal slugging mass, the thermal response of which controls the rate of expansion and contraction of the sealing ...


87
Pierre Demeyer: Circuit breaker with digital solid-state trip unit fitted with a calibration circuit. Merlin Gerin, Parkhurst & Oliff, July 21, 1987: US04682264 (54 worldwide citation)

Microprocessor-based solid-state trip unit (48) processing digital signals derived from analog signals supplied by current sensors (16). The analog signals are applied to a calibration circuit (34), which adapts the output range of the analog circuits to that of the logic circuits, to obtain with an ...


88
Hideo Kushida, Akikazu Kosugi, Hiromi Nagayama: Saturated polyester bottle-shaped container with hard coating and method of fabricating the same. Yoshino Kogyosho, Parkhurst & Oliff, February 11, 1986: US04569869 (54 worldwide citation)

This invention relates to a saturated polyester bottle-shaped container and a method of fabricating the same from a material such as polyethylene terephthalate incorporating high transparency and superior mechanical surface strength. The hard coating is formed by the steps of coating an ultraviolet ...


89
Yukio Taniguchi: Identification article with pattern-form fresnel hologram, fabrication thereof, and verification thereof. Dai Nippon Insatsu Kabushiki Kaisha, Parkhurst & Oliff, June 30, 1987: US04677285 (54 worldwide citation)

An identification article comprise a substrate and a pattern-form Fresnel hologram provided as an identification information providing layer on the surface or in the interior of the substrate structure. The pattern-form Fresnel hologram is formed by (a) forming a Fresnel hologram by exposing a photo ...


90
Thomas J Ulrich: Method for powering telephone apparatus and telephone apparatus powered directly from the telephone line without external power. Parkhurst Oliff & Berridge, February 7, 1989: US04803719 (54 worldwide citation)

A telephone apparatus powered directly from the telephone lines without external power includes a current converter in which current from a telephone line is limited by a transistor, current-sense resistor, and optical coupler acting together as a constant current device. This limited current is the ...