Inventor

Kiyokazu Tohma

Inventor

Hirakata, JP

Overview

1989–2005

Patent span

Physics

Primary field (CPC G)

Patents· 32 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 transducer48%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests30%

Y10TTechnical subjects covered by former us classification11%

B82YSpecific uses or applications of nanostructures6%

C23CCoating metallic material3%

B29CShaping or joining of plastics2%

PatentTitleYear

6,961,196'Master information carrier, method for producing the carrier, method and apparatus for writing information into magnetic record medium using the carrier'2005 6,909,565'Magnetic transfer method and magnetic transfer apparatus'2005 6,898,032'Method and apparatus for magnetic printing'2005 6,858,328'Master information support'2005 6,858,329'Master disc and method for manufacturing magnetic disc using the same'2005 6,714,367'Master information medium and method of master information recording'2004 6,611,388'Master information magnetic recorder'2003 6,606,209'Master information carrier, method for producing the carrier, method and apparatus for writing information into magnetic record medium using the carrier'2003 6,606,208'Master information carrier, method for producing the carrier, method and apparatus for writing information into magnetic record medium using the carrier'2003 6,590,727'Master information carrier, method for producing the carrier, method and apparatus for writing information into magnetic record medium using the carrier'2003 6,587,290'Master information carrier, method for producing the carrier, and method apparatus for writing information into magnetic record medium using the carrier'2003 6,567,227'Master information carrier, method for producing the carrier, method and apparatus for writing information into magnetic record medium using the carrier'2003 6,529,341'Magnetic recording/reproduction device using preformat information'2003 6,466,385'Method and apparatus of forming a magnetic disk with a servo sector and a data sector on a spiral track'2002 6,347,016'Master information carrier, process for producing the carrier, and method and apparatus for recording master information signal on magnetic recording medium by using the carrier'2002 6,242,085'Magnetic recording medium and method for producing the same'2001 5,851,660'Method of fabricating a thin-film magnetic recording medium and thin-film magnetic recording medium'1998 5,679,410'Continuous fabrication of thin film magnetic recording medium with vacuum deposition'1997 5,665,460'Magnetic recording medium'1997 5,554,440'Magnetic recording medium and method for producing the same'1996 5,549,936'Manufacturing method of magnetic recording medium'1996 5,534,324'Magnetic recording medium and method for producing the same'1996 5,472,506'Method and apparatus for producing magnetic recording medium'1995 5,458,914'Method for producing magnetic recording medium'1995 5,433,999'Magnetic recording medium comprising specific backcoat layer'1995 5,427,869'Magnetic recording medium and method for producing the same'1995 5,418,059'Magnetic recording medium and method for producing the same'1995 5,298,282'Production of magnetic recording medium'1994 5,202,149'Method for making a magnetic recording medium'1993 5,087,476'Method of producing thin film'1992 4,999,220'Method for manufacturing perpendicular magnetic recording medium'1991 4,859,501'Method for providing a perpendicular recording medium for use with a ring-shaped recording and reproducing head'1989

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1989–2005Patents assigned to MATSUSHITA ELECTRIC INDUSTRIAL CO LTD (32)· patent assignee history

1989–2005Based in Hirakata, JP· patent location history

1995–2005Based in Osaka, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD	32	1989–2005

Locations

Location	Patents	Span
Hirakata, JP	22	1989–2005
Osaka, JP	10	1995–2005