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Inventor

Mitsuhiro Oyama

Inventor
Sukagawa, JP

Overview

9→
Patents
1978–2011
Patent span
Electricity
Primary field (CPC H)

Patents· 9 as inventor

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

D05Bprimary
D05BSewing20%
F16LPipes20%
H02PControl or regulation of electric motors, electric generators or dynamo-electric converters20%
F16FSprings10%
H01CResistors10%
H03HImpedance networks, e.g. resonant circuits10%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests10%
PatentTitleYear
8,032,575'Digital signal processing apparatus and digital signal processing method'20116,979,028'Pipe joint'20056,880,861'Pipe joint'20056,773,000'Vibration isolation spring mount'20044,251,796'Slide-type potentiometer'19814,246,521'DC Motor speed control system'19814,228,383'Speed control circuit arrangement for an AC commutator motor'19804,085,692'Motor control apparatus for electrically-driven sewing machine'19784,078,507'Electrically driven sewing machine control apparatus'1978

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1978–1981Patents assigned to YAMAMOTO ELECTRIC IND CO LTD (3)· patent assignee history
1978Patents assigned to YAMAMOTO ELECTRIC IND CO INC (1)· patent assignee history
1978–1981Based in Sukagawa, JP· patent location history
2004Patents assigned to TOZEN SANGYO CO LTD (1)· patent assignee history
2004Based in Walnut, CA, US· patent location history
2005Patents assigned to TOZEN CORP (2)· patent assignee history
2005Based in Saitama, JP· patent location history
2011Patents assigned to TOSHIBA KK (1)· patent assignee history
2011Based in Kanagawa, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
YAMAMOTO ELECTRIC IND CO LTD31978–1981
TOZEN CORP22005
TOSHIBA KK12011
TOZEN SANGYO CO LTD12004
YAMAMOTO ELECTRIC IND CO INC11978
Locations
LocationPatentsSpan
Sukagawa, JP51978–1981
Saitama, JP22005
Kanagawa, JP12011
Walnut, California, US12004