Inventor
Kenji Tanagawa
Inventor
Tokyo, JP
Overview
Patents· 4 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
B29Cprimary
B29CShaping or joining of plastics21%
B29DProducing particular articles from plastics or from substances in a plastic state21%
B29LIndexing scheme associated with subclass b29c, relating to particular articles21%
G02BOptical elements, systems or apparatus11%
G02CSpectacles11%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests11%
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. inserts5%
PatentTitleYear
11,061,258Mold for plastic lens, method for manufacturing plastic lens, and plastic lens for eyeglasses202110,525,645Method for manufacturing functional plastic lens and polarizing plastic lens20208,506,857'Injection compression molding method of lens'20137,326,375'Injection compression molding method and injection compression machine of lens'2008Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
2008–2013Patents assigned to HOYA CORP (2)· patent assignee history
2008–2021Based in Tokyo, JP· patent location history
2013–2021Patents assigned to SAITO KIYOHIRO (2)· patent assignee history
2013–2021Patents assigned to TANAGAWA KENJI (2)· patent assignee history
2013Patents assigned to NISHIMOTO TATSUO (1)· patent assignee history
2020–2021Patents assigned to HOYA LENS THAILAND LTD (2)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| HOYA CORP | 2 | 2008–2013 |
| HOYA LENS THAILAND LTD | 2 | 2020–2021 |
| SAITO KIYOHIRO | 2 | 2013–2021 |
| TANAGAWA KENJIself | 2 | 2013–2021 |
| NISHIMOTO TATSUO | 1 | 2013 |
Locations
| Location | Patents | Span |
|---|---|---|
| Tokyo, JP | 4 | 2008–2021 |