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Inventor

Masatoshi Sawamura

Inventor
Saitama, JP

Overview

14→
Patents
1993–2021
Patent span
Electricity
Primary field (CPC H)

Patents· 14 as inventor

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

H01Qprimary
H01QAntennas, i.e. radio aerials43%
H04BTransmission17%
H01PWaveguides9%
A01NPreservation of bodies of humans or animals or plants or parts thereof4%
B21HMaking particular metal objects by rolling, e.g. screws, wheels, rings, barrels, balls4%
B22FWorking metallic powder4%
G01RMeasuring electric variables4%
G05FSystems for regulating electric or magnetic variables4%
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 systems4%
Y10TTechnical subjects covered by former us classification4%
PatentTitleYear
10,910,950Power conversion device20217,266,399'Clamshell portable wireless terminal with an upper housing and a lower housing connected to each other through a hinge with a built-in antenna housed in a projection section near the hinge'20077,083,760'Method of forming a powder compact'20067,082,324'Built-in antenna of a portable wireless terminal for communication between mobile units'20067,069,043'Wireless communication device with two internal antennas'20067,053,848'Antenna device and portable radio communication terminal'20066,535,170'Dual band built-in antenna device and mobile wireless terminal equipped therewith'20036,366,247'Antenna device and portable radio set'20026,362,793'Antenna device and portable radio set'20026,362,792'Antenna apparatus and portable radio set'20026,295,030'Antenna apparatus and portable radio communication apparatus'20016,229,485'Antenna device'20015,824,168'Process for gear-rolling a high accuracy gear'19985,230,893'Stable agrochemical compositions including alpha-unsaturated amine derivative and acid incorporated into a carrier'1993

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1993Patents assigned to TAKEDA CHEMICAL INDUSTRIES LTD (1)· patent assignee history
1993Based in Tsukuba, JP· patent location history
1998–2006Patents assigned to TOYOTA MOTOR CO LTD (2)· patent assignee history
1998Based in Nagoya, JP· patent location history
2001–2006Patents assigned to SONY CORP (7)· patent assignee history
2001–2007Based in Saitama, JP· patent location history
2006–2007Patents assigned to SONY ERICSSON MOBILE COMM JP (3)· patent assignee history
2006Based in Aichi, JP· patent location history
2021Patents assigned to MITSUBISHI ELECTRIC CORP (1)· patent assignee history
2021Based in Tokyo, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
SONY CORP72001–2006
SONY ERICSSON MOBILE COMM JP32006–2007
TOYOTA MOTOR CO LTD21998–2006
MITSUBISHI ELECTRIC CORP12021
TAKEDA CHEMICAL INDUSTRIES LTD11993
Locations
LocationPatentsSpan
Saitama, JP102001–2007
Tokyo, JP12021
Aichi, JP12006
Nagoya, JP11998
Tsukuba, JP11993