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Inventor

Katsumi Koyama

Inventor
Tokyo, JP

Overview

21→
Patents
1981–2011
Patent span
Mechanical engineering
Primary field (CPC F)

Patents· 21 as inventor

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

F16Kprimary
F16KValves24%
Y10TTechnical subjects covered by former us classification22%
F25BRefrigeration machines, plants or systems15%
B21DWorking or processing of sheet metal or metal tubes, rods or profiles without essentially removing material10%
G05BControl or regulating systems in general5%
B23QDetails, components, or accessories for machine tools, e.g. arrangements for copying or controlling2%
B30BPresses in general2%
B62JCycle saddles or seats2%
B62KCycles2%
B62MRider propulsion of wheeled vehicles or sledges2%
PatentTitleYear
7,963,354'Air-inlet structure for motorcycle'20117,188,695'Motorcycle'20077,117,895'Switching valve'20067,117,889'Three-way valve'20067,069,949'Four-way switching valve'20067,028,713'Switching valve'20066,883,545'Three-way switching valve'20056,860,294'Four-way switching valve'20056,823,897'Four-way switching valve'20046,810,911'Four-way switching valve'20046,783,110'Proportional solenoid valve'20046,532,764'Degree of supercooling control type expansion valve'20036,390,441'Solenoid operated pilot valve'20026,152,178'Four-way directional control valve'20005,983,688'Method and apparatus for displaying die layout in press brake and for checking interference'19995,439,385'Connector for circuit board'19954,831,862'Multistep bending machine'19894,803,372'Line position detecting apparatus for detecting a V-shaped indent'19894,486,841'Bending press'1984D0265832'Electric organ'19824,282,738'Method and apparatus for adjusting stroke length of a ram for presses'1981

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1981–1989Patents assigned to AMADA CO LTD (4)· patent assignee history
1981–1989Based in Hiratsuka, JP· patent location history
1982Patents assigned to NIPPON MUSICAL INSTRUMENTS MFG (1)· patent assignee history
2000–2006Patents assigned to TGK CO LTD (11)· patent assignee history
2000–2006Based in Tokyo, JP· patent location history
2004Patents assigned to TGK CO INC (1)· patent assignee history
2004Based in Hachioji, JP· patent location history
2007–2011Patents assigned to HONDA MOTOR CO LTD (2)· patent assignee history
2007Based in Wako, JP· patent location history
2011Based in Saitama, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
TGK CO LTD112000–2006
AMADA CO LTD41981–1989
HONDA MOTOR CO LTD22007–2011
NIPPON MUSICAL INSTRUMENTS MFG11982
TGK CO INC12004
Locations
LocationPatentsSpan
Tokyo, JP112000–2006
Hiratsuka, JP41981–1989
Saitama, JP12011
Wako, JP12007
Hachioji, JP12004