Inventor

Katsumasa Yamazaki

Inventor

Tokyo, JP

Overview

2→

Patents

1991–2021

Patent span

Physics

Primary field (CPC G)

Patents· 2 as inventor

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

B32Bprimary

B32BLayered products, i.e. products built-up of strata of flat or non-flat, e.g. cellular or honeycomb, form14%

G02FOptical devices or arrangements for the control of light by modification of the optical properties of the media of the elements involved therein14%

G04GElectronic time-pieces14%

G09FDisplaying14%

H01LSemiconductor devices14%

H10KOrganic electric solid-state devices14%

Y02EReduction of greenhouse gas [ghg] emissions, related to energy generation, transmission or distribution14%

PatentTitleYear

10,964,898Protection sheet, display, and electronic apparatus2021 5,043,956'Wristwatch with oscillation alarm'1991

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1991Patents assigned to SEIKO INSTR INC (1)· patent assignee history

1991–2021Based in Tokyo, JP· patent location history

2021Patents assigned to JOLED INC (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
JOLED INC	1	2021
SEIKO INSTR INC	1	1991

Locations

Location	Patents	Span
Tokyo, JP	2	1991–2021