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Inventor

Tadao Kameyama

Inventor
Ibaraki, JP

Overview

3→
Patents
1978–1979
Patent span
Performing operations
Primary field (CPC B)

Patents· 3 as inventor

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

B66Bprimary
B66BElevators33%
G05FSystems for regulating electric or magnetic variables17%
H02MApparatus for conversion between ac and ac, between ac and dc, or between dc and dc, and for use with mains or similar power supply systems17%
Y02BClimate change mitigation technologies related to buildings, e.g. housing, house appliances or related end-user applications17%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests17%
PatentTitleYear
4,150,734'Elevator control apparatus'19794,101,819'Three phase controlling system'19784,094,385'Levelling apparatus for AC elevator'1978

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1978–1979Patents assigned to HITACHI LTD (3)· patent assignee history
1978Based in Ibaraki, JP· patent location history
1979Based in Higashi-Ibaraki-gun, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
HITACHI LTD31978–1979
Locations
LocationPatentsSpan
Ibaraki, JP21978
Higashi-Ibaraki-gun, JP11979