Inventor
Akihiro Muramatsu
Inventor
Kagawa, JP
Overview
Patents· 12 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 transducer21%
G02BOptical elements, systems or apparatus16%
G02CSpectacles16%
LOC1611%
B29DProducing particular articles from plastics or from substances in a plastic state5%
B60RVehicles, vehicle fittings, or vehicle parts, not otherwise provided for5%
G02FOptical devices or arrangements for the control of light by modification of the optical properties of the media of the elements involved therein5%
G06FElectric digital data processing5%
G07CTime or attendance registers5%
H01RElectrically-conductive connections5%
PatentTitleYear
10,859,865Lens, lens blank, and eyewear202010,423,011Lens, lens blank, and eyewear2019D0854607Eyeglasses component20198,979,262'Semi-finished blank for varifocal lens, varifocal lens, and varifocal eyeglasses'20158,121,713'Electronic apparatus, method for generating digital signal, digital signal recording medium, and signal processing apparatus'20127,460,307'Projector lens system'20087,403,099'Smart key system'2008D0558813'OPTICAL LENS'20086,747,924'Optical disk reproduction apparatus'20046,650,484'Zoom lens, and its manufacturing method'20036,381,203'Optical disk reproducing method and apparatus'20026,160,772'Tilt control device for an optical disk device'2000Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
2000–2012Patents assigned to YAMAHA CORP (4)· patent assignee history
2000–2004Based in Hamamatsu, JP· patent location history
2003–2008Patents assigned to MATSUSHITA ELECTRIC INDUSTRIAL CO LTD (2)· patent assignee history
2003–2008Based in Kagawa, JP· patent location history
2008Patents assigned to DENSO CORP (1)· patent assignee history
2012Patents assigned to MURAMATSU AKIHIRO (1)· patent assignee history
2015–2020Patents assigned to MITSUI CHEMICALS INC (4)· patent assignee history
2019Based in Nagoya, JP· patent location history
2019Based in Tokyo, JP· patent location history
2020Based in Marugame, JP· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| MITSUI CHEMICALS INC | 4 | 2015–2020 |
| YAMAHA CORP | 4 | 2000–2012 |
| MATSUSHITA ELECTRIC INDUSTRIAL CO LTD | 2 | 2003–2008 |
| DENSO CORP | 1 | 2008 |
| MURAMATSU AKIHIROself | 1 | 2012 |
Locations
| Location | Patents | Span |
|---|---|---|
| Kagawa, JP | 3 | 2003–2008 |
| Hamamatsu, JP | 3 | 2000–2004 |
| Marugame, JP | 1 | 2020 |
| Nagoya, JP | 1 | 2019 |
| Tokyo, JP | 1 | 2019 |