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Inventor

Takeo Ohta

Inventor
Nara, JP

Overview

31→
Patents
1976–2007
Patent span
Physics
Primary field (CPC G)

Patents· 31 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 transducer42%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests24%
Y10TTechnical subjects covered by former us classification12%
G03CPhotosensitive materials for photographic purposes4%
C21DModifying the physical structure of ferrous metals3%
G11CStatic stores3%
H01FMagnets3%
Y02PClimate change mitigation technologies in the production or processing of goods3%
G02FOptical devices or arrangements for the control of light by modification of the optical properties of the media of the elements involved therein1%
G21CNuclear reactors1%
PatentTitleYear
7,193,947'Optical information recording method, optical information recording device and optical information recording medium'20076,967,911'Multivalued information recording method, multivalued information recording apparatus, and recording medium'2005RE036383'Optical recording medium and production process for the medium'19995,753,334'Optical recording medium'19985,681,632'Optical information recording medium'19975,674,649'Method of recording information'19975,665,520'Optical recording medium'19975,610,879'Optical reproducing device, optical reproducing method using the same, and optical record medium used in the same'19975,587,216'Optical recording medium'19965,439,752'Optical recording medium and reflecting film for use therein'19955,395,669'Optical record medium'19955,256,518'Information storage disk employing a reflective layer having good malleability'19935,230,973'Method of recording and erasing information in an erasible optical recording medium'19935,194,363'Optical recording medium and production process for the medium'19935,191,565'Optical information recording medium'19935,151,295'Process for manufacturing an optical recording medium'19925,147,701'Information recording medium'19925,024,910'Optical information recording medium'19914,852,076'Optical information recording and reproducing disc employing a film having thermally changeable optical characteristics'19894,770,923'Protection film structure for functional devices'19884,621,794'Apparatus for producing a grain-oriented electromagnetic steel strip or sheet'19864,547,875'Optical recording and retrieving disc'19854,500,366'Process for producing a grain-oriented electromagnetic steel strip or sheet'19854,457,794'Method for manufacturing optical memory disc'19844,403,318'Apparatus and method for recording, reproducing and erasing on optical recording discs'19834,330,883'System and method of optical information storage in a recording disc'19824,322,839'Method and apparatus for recording and reproducing information on and from an optical disk'19824,278,734'Optical information recording material and method of recording and reproducing information using same material'19814,110,160'Fuel assembly spacer within the coolant duct'19784,091,171'Optical information storage material and method of making it'19783,971,874'Optical information storage material and method of making it'1976

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1976–2007Patents assigned to MATSUSHITA ELECTRIC INDUSTRIAL CO LTD (28)· patent assignee history
1976–2007Based in Nara, JP· patent location history
1978Patents assigned to DORYOKURO KAKUNENRYO (1)· patent assignee history
1978Based in Sagamihara, JP· patent location history
1981–1982Based in Kadoma, JP· patent location history
1985–1986Patents assigned to NIPPON STEEL CORP (2)· patent assignee history
1985–1986Based in Otawara-shi, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD281976–2007
NIPPON STEEL CORP21985–1986
DORYOKURO KAKUNENRYO11978
Locations
LocationPatentsSpan
Nara, JP261976–2007
Otawara-shi, JP21985–1986
Kadoma, JP21981–1982
Sagamihara, JP11978