Inventor

Eizaburo Yamada

Inventor

Tama, JP

Overview

4→

Patents

1989–2021

Patent span

Performing operations

Primary field (CPC B)

Patents· 4 as inventor

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

B82Yprimary

B82YSpecific uses or applications of nanostructures33%

B23KSoldering or unsoldering17%

G02FOptical devices or arrangements for the control of light by modification of the optical properties of the media of the elements involved therein17%

H01SDevices using the process of light amplification by stimulated emission of radiation [laser] to amplify or generate light17%

H10DInorganic electric semiconductor devices17%

PatentTitleYear

11,084,121Double-acting friction stir spot welding method and apparatus2021 5,001,536'Semiconductor device'1991 4,933,728'Semiconductor optical device'1990 4,847,573'Optical modulator'1989

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1989–1991Patents assigned to HITACHI LTD (3)· patent assignee history

1989–1991Based in Tama, JP· patent location history

2021Patents assigned to KAWASAKI HEAVY IND LTD (1)· patent assignee history

2021Based in Ichinomiya, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
HITACHI LTD	3	1989–1991
KAWASAKI HEAVY IND LTD	1	2021

Locations

Location	Patents	Span
Tama, JP	3	1989–1991
Ichinomiya, JP	1	2021