Inventor
Masao Kumagai
Inventor
Kawasaki, JP
Overview
Patents· 21 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
G09Gprimary
G09GArrangements or circuits for control of indicating devices using static means to present variable information25%
H03KPulse technique8%
H03MCoding8%
C21DModifying the physical structure of ferrous metals6%
C23CCoating metallic material6%
G11BInformation storage based on relative movement between record carrier and transducer6%
H01HElectric switches6%
A61PSpecific therapeutic activity of chemical compounds or medicinal preparations3%
B23PMetal-working not otherwise provided for3%
B24CAbrasive or related blasting with particulate material3%
PatentTitleYear
8,823,344'Control circuit, electronic device, and method for controlling power supply'20148,518,543'DLC-coated sliding member and method for producing the same'20137,978,168'D/A converter'20117,903,071'Driver IC for display and display including same'20117,838,075'Surface strengthening method'20107,580,020'Semiconductor device and liquid crystal panel driver device'20097,567,873'Nondestructive inspection method and apparatus for a surface processed by shot peening'20097,268,763'Method for driving display and drive circuit for display'20077,215,312'Semiconductor device, display device, and signal transmission system'20077,180,512'Integrated circuit free from accumulation of duty ratio errors'20077,098,878'Semiconductor device and liquid crystal panel driver device'20067,079,104'Semiconductor device and liquid crystal panel display driver'20066,847,346'Semiconductor device equipped with transfer circuit for cascade connection'20055,939,543'Stable solid 2-octynyl adenosine and process for producing the same'19994,883,975'Schmitt trigger circuit'19894,835,642'Magnetic head assembly for double-sided disk drive apparatus'19894,774,620'Logic circuit'19884,764,830'Magnetic head assembly in floppy disk drive'19884,703,202'Two-stage gate circuit providing inverted and non-inverted outputs'19874,383,153'Locking type push-button switch'19834,259,559'Illuminated push-button electrical switch assembly'1981Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1981–1989Patents assigned to ALPS ELECTRIC CO LTD (4)· patent assignee history
1981–1989Based in Furukawa, JP· patent location history
1987–2007Patents assigned to FUJITSU LTD (9)· patent assignee history
1987–2010Based in Tokyo, JP· patent location history
2005–2009Based in Kawasaki, JP· patent location history
2007–2014Based in Kasugai, JP· patent location history
2011Patents assigned to FUJITSU SEMICONDUCTOR LTD (2)· patent assignee history
2013–2014Patents assigned to KUMAGAI MASAO (2)· patent assignee history
2013Patents assigned to FUJI KIHAN CO LTD (1)· patent assignee history
2013Based in Ebina, JP· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| FUJITSU LTD | 9 | 1987–2007 |
| ALPS ELECTRIC CO LTD | 4 | 1981–1989 |
| FUJITSU SEMICONDUCTOR LTD | 2 | 2011 |
| KUMAGAI MASAOself | 2 | 2013–2014 |
| FUJI KIHAN CO LTD | 1 | 2013 |
Locations
| Location | Patents | Span |
|---|---|---|
| Kawasaki, JP | 6 | 2005–2009 |
| Kasugai, JP | 4 | 2007–2014 |
| Furukawa, JP | 4 | 1981–1989 |
| Tokyo, JP | 3 | 1987–2010 |
| Ebina, JP | 1 | 2013 |