Inventor

Issei Hayakawa

Inventor

Nagoya, JP

Overview

8→

Patents

1981–1991

Patent span

Chemistry

Primary field (CPC C)

Patents· 8 as inventor

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

C04Bprimary

C04BLime, magnesia64%

F02BInternal-combustion piston engines9%

F02FCylinders, pistons or casings, for combustion engines9%

F05CIndexing scheme relating to materials, material properties or material characteristics for machines, engines or pumps other than non-positive-displacement machines or engines9%

Y02TClimate change mitigation technologies related to transportation9%

PatentTitleYear

5,017,531'Silicon nitride ceramic sintered bodies'1991 5,015,608'High hardness silicon nitride sintered bodies'1991 5,002,907'Homogenous silicon nitride sintered body'1991 4,871,697'Method of producing homogeneous silicon nitride sintered bodies'1989 4,820,665'Ceramic sintered bodies and a process for manufacturing the same'1989 4,810,681'Method of manufacturing dense cordierite'1989 4,742,759'Ceramic insert cast piston'1988 4,273,587'Polycrystalline transparent spinel sintered body and a method for producing the same'1981

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1981–1991Patents assigned to NGK INSULATORS LTD (8)· patent assignee history

1981Based in Tsushima, JP· patent location history

1988–1991Based in Nagoya, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
NGK INSULATORS LTD	8	1981–1991

Locations

Location	Patents	Span
Nagoya, JP	7	1988–1991
Tsushima, JP	1	1981