Inventor

Masatoshi Okamura

Inventor

Tokyo, JP

Overview

1979–2006

Patent span

Physics

Primary field (CPC G)

Patents· 93 as inventor

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

G11Bprimary

G11BInformation storage based on relative movement between record carrier and transducer83%

B29CShaping or joining of plastics4%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests4%

Y10TTechnical subjects covered by former us classification4%

B29LIndexing scheme associated with subclass b29c, relating to particular articles3%

B29KIndexing scheme associated with subclasses b29b, b29c or b29d, relating to moulding materials or to materials for moulds, reinforcements, fillers or preformed parts, e.g. inserts1%

C08JWorking-up1%

C23CCoating metallic material1%

F16FSprings1%

PatentTitleYear

6,994,287'Tape cartridge'2006 6,822,834'Tape cartridge having a plurality of identification openings'2004 6,547,174'Housing for tape cartridge and hold for mold for forming the same'2003 6,532,133'Recording medium cartridge with improved welding characteristics'2003 6,490,133'Tape cartridge with a cell for a leader hook member and a cell for a leader'2002 6,452,748'Tape cartridge with matched brake lock and brake release plate'2002 6,450,432'Tape cartridge'2002 6,446,896'Tape cassette'2002 6,418,113'Disk cartridge'2002 6,411,466'Tape cartridge'2002 6,388,838'Tape cartridge'2002 6,388,837'Tape cartridge'2002 6,370,108'Disc cartridge'2002 6,318,658'Tape cassette with improved cover operation'2001 6,311,917'Tape reel for tape cassette'2001 6,307,831'Disc cartridge having reference holes'2001 6,302,345'Tape cassette'2001 6,292,331'Tape cassette'2001 6,243,355'Disk cartridge with error insertion prevention mechanism'2001 6,213,425'Tape reel for tape cassette'2001 6,215,619'Tape cassette with reel brake release lever'2001 6,205,115'Disc cartridge'2001 6,191,920'Tape cassette with tape guides press-fit over ribbed guide posts'2001 6,137,653'Release mechanism for a reel brake member for a tape cassette'2000 6,125,011'Disc cartridge with particular cover configuration'2000 6,118,631'Tape cassette'2000 6,108,298'Disc cartridge'2000 6,094,326'Disc cartridge with improved shutter mechanism'2000 5,954,198'Cartridge receiving casing'1999 5,873,538'Magnetic tape cassette'1999 5,868,336'Tape guides for tape cassette'1999 5,730,382'Tapping bosses of magnetic tape cassette'1998 5,657,938'Video tape cassette with fixing portions remotely positioned from the front lid'1997 5,626,305'Tape cassette having ribs and window'1997 5,593,103'Reel spring for tape cassette and method for preparing it'1997 5,585,988'Tape cassette, tape cassette halves forming mold, and method for preparing a tape cassette'1996 5,540,399'Tape cassette'1996 5,507,444'Tape cassette with improved spring for locking plate'1996 5,492,283'Tape casette and reel spring therefor'1996 5,484,058'Tape cassette storage container with pressing projections'1996 5,417,378'Tape cassette'1995 5,385,312'Tape cassette'1995 5,381,893'Housing case for tape cassette with index card'1995 5,375,024'Tape cassette'1994 5,249,759'Tape cassette casing having biasing element for improved traveling and take-up of magnetic tape'1993 5,232,093'Tape cassette housing'1993 5,189,583'Magnetic tape cassette having ribs in reel areas'1993 5,172,288'Magnetic recording medium and a tape guide in a cartridge'1992 5,115,365'Magnetic tape cassette having elastic pad element'1992 5,107,386'Magnetic tape cassette'1992 5,074,487'Tape reel for tape cassette'1991 5,068,146'Polymerized films, medium related members, and process for making'1991 5,034,839'Structures for fixedly supporting tape guides in a magnetic tape cassette'1991 5,004,180'Magnetic tape cassette'1991 4,991,047'Tape guides and method of manufacturing the same'1991 4,988,573'Medium related members'1991 4,973,012'Magnetic tape cassette'1990 4,930,714'Reel for a magnetic tape'1990 4,899,242'Locking mechanism of magnetic tape cassette'1990 4,885,651'Tape cassette with low friction slide member for guiding movement of a lid thereon'1989 4,865,265'Magnetic tape cassette'1989 4,863,116'Guide member in a cassette for data carrying material'1989 4,858,849'Tape cassette housing'1989 4,781,340'Magnetic tape cassette'1988 4,779,157'A Shaft having a groove for a video tape cartridge and metallic molds for its preparation'1988 4,769,730'Magnetic tape cassette with an improved guard panel'1988 4,717,980'Tape cassette with low friction slide member for guiding movement of a lid thereon'1988 4,682,259'Magnetic tape cassette with dustproof mechanism'1987 4,679,109'Tape cassette driven rib device'1987 4,663,689'Tape pad for a magnetic tape cassette'1987 4,631,619'Magnetic tape cassette having improved reel locking means'1986 4,585,187'Magnetic tape cassette'1986 4,546,936'Magnetic tape cassette casing'1985 4,504,027'Magnetic tape clamping device'1985 4,457,474'Magnetic tape cartridge'1984 4,438,860'Magnetic tape cassette'1984 4,422,550'Structure of pivotal-shaft receiving hole of thin-walled molding product'1983 4,422,599'Magnetic tape cassette'1983 4,422,119'Leader tape'1983 4,420,128'Magnetic tape cassette'1983 4,386,746'Magnetic tape cassette'1983 4,371,286'Tapping boss of magnetic tape cassette'1983 4,358,070'Magnetic tape cassette'1982 4,358,071'Cassette case'1982 4,304,374'Tape cassette'1981 4,291,800'Tape cassette'1981 4,254,917'Reel for tape cassette'1981 4,227,622'Tape cassette'1980 4,212,437'Tape cassette'1980 4,195,797'Tape cassette'1980 4,187,998'Tape cassette'1980 4,181,272'Tape cassette reel'1980 4,165,051'Tape reel'1979

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1979–1984Patents assigned to TDK ELECTRONICS CO LTD (18)· patent assignee history

1979–2006Based in Tokyo, JP· patent location history

1981–2003Based in Saku, JP· patent location history

1983Patents assigned to HOTSUKI HIDEKI (1)· patent assignee history

1983Patents assigned to KAWAKAMI YOSHIO (1)· patent assignee history

1983Patents assigned to OKAMURA MASATOSHI (1)· patent assignee history

1985–2006Patents assigned to TDK CORP (73)· patent assignee history

1988–2002Based in Nagano, JP· patent location history

1998Based in Suku, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
TDK CORP	73	1985–2006
TDK ELECTRONICS CO LTD	18	1979–1984
HOTSUKI HIDEKI	1	1983
KAWAKAMI YOSHIO	1	1983
OKAMURA MASATOSHIself	1	1983

Locations

Location	Patents	Span
Tokyo, JP	37	1979–2006
Saku, JP	37	1981–2003
Nagano, JP	18	1988–2002
Suku, JP	1	1998