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Inventor

Toshiaki Umeda

Inventor
Tokyo, JP

Overview

7→
Patents
1996–1999
Patent span
Physics
Primary field (CPC G)

Patents· 7 as inventor

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

G02Cprimary
G02CSpectacles100%
PatentTitleYear
5,864,380'Progressive power lens'19995,805,265'Progressive lens'19985,666,184'Progressive power lens'19975,557,348'Progressive power lens'19965,523,807'Progressive multifocal lens'19965,510,860'Progressive multifocal lens'19965,506,630'Progressive multifocal lens'1996

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1996–1999Patents assigned to NIKON CORP (7)· patent assignee history
1996–1999Based in Tokyo, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
NIKON CORP71996–1999
Locations
LocationPatentsSpan
Tokyo, JP71996–1999