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Inventor

Izumi Umemura

Inventor
Hiratsuka, JP

Overview

4→
Patents
1982–2009
Patent span
Human necessities
Primary field (CPC A)

Patents· 4 as inventor

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

A61Bprimary
A61BDiagnosis50%
C12MApparatus for enzymology or microbiology17%
G01SRadio direction-finding17%
G02BOptical elements, systems or apparatus17%
PatentTitleYear
7,628,536'Microscope apparatus'20095,737,058'Eye examination apparatus using ultrasonic wave radiation'19984,390,255'Eye-refractometer device'19834,353,625'Eye-refractometer device'1982

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1982–1983Patents assigned to NIPPON KOGAKU KK (2)· patent assignee history
1982–1983Based in Kawasaki, JP· patent location history
1998–2009Patents assigned to NIKON CORP (2)· patent assignee history
1998–2009Based in Hiratsuka, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
NIKON CORP21998–2009
NIPPON KOGAKU KK21982–1983
Locations
LocationPatentsSpan
Hiratsuka, JP21998–2009
Kawasaki, JP21982–1983