1
Ryoichi Sado, Takekuni Okamoto, Shigeru Matumoto: Key-board switch unit. Shin Etsu Polymer, Hopgood Calimafde Kalil Blaustein & Judlowe, November 24, 1981: US04302648 (135 worldwide citation)

The invention provides a key-board switch unit used, for example, in pocketable electronic calculators comprising a base plate having at least one pair of switch electrodes and a covering pad made of an insulating rubber and provided with at least one contact member made of an electroconductive rubb ...


2
Ryoichi Sado: Interconnectors. Shin Etsu Polymer, Toren McGeady & Stanger, October 20, 1981: US04295700 (104 worldwide citation)

A novel press-contact type interconnector is proposed which is formed by comprising (a) a rectangular connecting piece made of a film or sheet of an elastic material having anisotropical electroconductivity in the direction substantially parallel to one edge line thereof and (b) a couple of holder m ...


3
Ryoichi Sado: Key board switch unit with illumination. Shin Etsu Polymer, Hopgood Calimafde Kalil Blaustein & Judlowe, August 10, 1982: US04343975 (69 worldwide citation)

The invention provides a novel key board switch unit with illumination in the pushing areas, e.g. push buttons. Different from conventional ones, the pushing areas in the inventive unit are illuminated indirectly with the light emitted from a lamp positioned at a remote place not directly visible fr ...


4
Ryoichi Sado: Interconnectors. Shin Etsu Polymer, Toren McGeady and Stanger, September 6, 1983: US04402562 (61 worldwide citation)

A novel press-contact type interconnector is proposed which is formed by comprising (a) a rectangular connecting piece of a woven cloth, the woof fibers being conductive and the warp fibers being non-conductive, having antisotropical electroconductivity in the direction substantially parallel to one ...


5
Ryoichi Sado, Kazutoki Tahara: Method for manufacturing an elastic composite body with metal wires embedded therein. Shin Etsu Polymer, Hopgood Calimafde Kalil Blaustein & Judlowe, June 4, 1985: US04520562 (55 worldwide citation)

The invention provides a novel and improved method for manufacturing an elongated piece of a composite body composed of a rubber or plastic body of an elongated form and a plurality of electroconductive linear bodies embedded in or bonded on the surface of the elongated rubber or plastic body in ali ...


6
Ryoichi Sado: Anisotropically pressure-sensitive electroconductive composite sheets and method for the preparation thereof. Shin Etsu Polymer, McGlew and Tuttle, April 22, 1980: US04199637 (48 worldwide citation)

Anisotropically pressure-sensitive electroconductive composite sheets are provided which have a very low electric conductive resistance in the direction perpendicular to the plane of the sheet when compressed with an adequate pressure in the direction but a high insulating resistance in all directio ...


7
Ryoichi Sado: Press-contact type interconnectors. Shin Etsu Polymer, Hopgood Calimafde Kalil Blaustein & Judlowe, May 18, 1982: US04330165 (45 worldwide citation)

The invention provides a novel interconnector of presscontact type of a rod-like configuration used as sandwiched between two circuit boards for electric connection therebetween. Different from the conventional interconnectors of the similar types composed of a rod-like member of an insulating rubbe ...


8
Ryoichi Sado, Akio Nakamura, Naoki Kodama: Pressure-sensitive resistors. Shin Etsu Polymer, Hopgood Calimafde Kalil Blaustein & Lieberman, July 31, 1979: US04163204 (45 worldwide citation)

The pressure-sensitive resistor comprising an electroconductive elastomer, in which an electroconductive particulate material is dispersed, two electrodes placed on the opposing surfaces of the elastomer, a means for providing a compressive force between the electrodes and a means for adjusting the ...


9
Ryoichi Sado: Anisotropically pressure-sensitive electroconductive composite sheets and method for the preparation thereof. Shin Etsu Polymer, McGlew and Tuttle, February 24, 1981: US04252391 (43 worldwide citation)

Anisotropically pressure-sensitive electroconductive composite sheets are provided which have a very low electric conductive resistance in the direction perpendicular to the plane of the sheet when compressed with an adequate pressure in the direction but a high insulating resistance in all directio ...


10
Ryoichi Sado, Kazutoki Tahara: Pressure-sensitive resistance elements. Shin Etsu Polymer, McGlew and Tuttle, March 20, 1979: US04145317 (42 worldwide citation)

An improved pressure-sensitive resistance element is provided which is composed of an electrically non-conductive matrix of a rubbery elastomer and electrically conductive particles dispersed therethrough to have a gradient of distribution from one side to the other of the matrix. Such resistance el ...