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Inventor

Taketoshi Ishihara

Inventor
Tokyo, JP

Overview

9→
Patents
1978–1988
Patent span
Human necessities
Primary field (CPC A)

Patents· 9 as inventor

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

A61Bprimary
A61BDiagnosis73%
G01MTesting static or dynamic balance of machines or structures27%
PatentTitleYear
4,753,527'Visual acuity testing apparatus'19884,408,847'Refractory power measuring device'19834,306,778'Eye refractmeters using infrared rays'19814,299,455'Vision testing instrument'19814,293,199'Apparatus for detecting astigmatic axes and measuring refractive powers'19814,277,150'Eye refractmeter'19814,192,582'Ophthalmometer'19804,162,852'Method and device for measuring diopters of astigmatic lenses'19794,094,592'Ophthalmic examination chart projector'1978

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1978–1983Patents assigned to TOKYO OPTICAL (8)· patent assignee history
1978Based in Soka, JP· patent location history
1979Based in Sohka, JP· patent location history
1980–1988Based in Tokyo, JP· patent location history
1988Patents assigned to KIGAKU KIKAI KK (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
TOKYO OPTICAL81978–1983
KIGAKU KIKAI KK11988
Locations
LocationPatentsSpan
Tokyo, JP71980–1988
Sohka, JP11979
Soka, JP11978