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Inventor

Yoshiaki Ishida

Inventor
Chichibu, JP

Overview

5→
Patents
1988–1999
Patent span
Physics
Primary field (CPC G)

Patents· 5 as inventor

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

E21Dprimary
E21DShafts33%
G01CMeasuring distances, levels or bearings33%
G01RMeasuring electric variables17%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests17%
PatentTitleYear
5,915,790'Tunnel boring machine'19995,237,384'Laser positioner and marking method using the same'19935,198,868'Laser surveying system having a function of marking reference points'19935,090,325'Tunnel driving method'19924,719,582'Method and apparatus for determining the chemical structure of an unknown substance'1988

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1988Based in Ube, JP· patent location history
1992–1999Patents assigned to SATO KOGYO (4)· patent assignee history
1992Based in Saitama, JP· patent location history
1993Patents assigned to MAC CO LTD (2)· patent assignee history
1993Based in Chichibu, JP· patent location history
1999Patents assigned to HAZAMA GUMI (1)· patent assignee history
1999Patents assigned to KOMATSU MFG CO LTD (1)· patent assignee history
1999Patents assigned to MAEDA CONSTRUCTION (1)· patent assignee history
1999Based in Tokyo, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
SATO KOGYO41992–1999
MAC CO LTD21993
HAZAMA GUMI11999
KOMATSU MFG CO LTD11999
MAEDA CONSTRUCTION11999
Locations
LocationPatentsSpan
Chichibu, JP21993
Tokyo, JP11999
Saitama, JP11992
Ube, JP11988