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Inventor

Keiji Oyoshi

Inventor
Tsukuba, JP

Overview

3→
Patents
1991–1993
Patent span
Chemistry
Primary field (CPC C)

Patents· 3 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

C03Cprimary
C03CChemical composition of glasses, glazes or vitreous enamels50%
G02BOptical elements, systems or apparatus25%
H10PGeneric processes or apparatus for the manufacture or treatment of devices covered by class h1025%
PatentTitleYear
5,234,843'Method of making a semiconductor film where the hydrogen and/or fluorine is released prior to ion beam crystallization'19935,066,514'Method of forming optical waveguides by ion implantation'19914,986,841'Method of preparing an alkali metal diffusion preventive layer'1991

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1991–1993Patents assigned to NIPPON SHEET GLASS CO LTD (3)· patent assignee history
1991–1993Based in Tsukuba, JP· patent location history
1991Based in Osaka, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
NIPPON SHEET GLASS CO LTD31991–1993
Locations
LocationPatentsSpan
Tsukuba, JP21991–1993
Osaka, JP11991