Ngk Spark Plug Company, Limited

Yoshimasa Shibata

Kazuo Kondo

Asao Morikawa

Shigeo Niwa

Masateru Hattori

Hiroshi Iwata

Katsutoshi Bekki

Kazuto Tsuge

An artificial radix dentis comprises a prong portion buried in an alveolar bone, which is made of a SiC-based ceramic material or is covered with a SiC-based film.

SiC based artificial dental implant

An artificial joint has a first member mounted on a first bone and a second member mounted on a second member. An angle defined between the first and second members is variable. The first member has a convex curved surface and the second member has a concave curved surface with is in sliding contact with the convex curved surface. A groove is formed in one of the first and second members and a boss inserted into the groove for limiting the sliding movement of the joint in a single plane is formed in the other of the members. Also, an artificial fixed knuckle bone is disclosed.

Artificial bone joint

A high-density wiring multi-layered substrate comprising a plurality of sequentially laminated green sheets containing crystallizable glass, each of the green sheets having a conductor paste on the surface thereof, the conductive component of the conductor paste comprising at least about 80 wt % of one copper component selected from copper and copper oxide and at least one member selected from up to about 15 parts by weight of MnO.sub.2 and up to about 10 parts by weight of Ag.sub.2 O based on 100 parts by weight of said copper component in terms of metallic copper.

High-density wiring multilayered substrate

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Aichi, Japan

Yoshimasa Shibata