Inventor
Akiyasu Ishii
Inventor
Fukushima, JP
Overview
Patents· 2 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
C08Jprimary
C08JWorking-up50%
C08LCompositions of macromolecular compounds25%
G02BOptical elements, systems or apparatus25%
PatentTitleYear
5,042,924'Optical phase plate and production process thereof'19914,391,763'Process for the manufacture of halogen-containing resin particles of larger bulk density comprising mixing particles of the resin with inorganic salts, treated in a mixture in a gaseous phase and separating the inorganic salt from the product'1983Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1983–1991Patents assigned to KUREHA CHEMICAL IND CO LTD (2)· patent assignee history
1983Based in Iwaki, JP· patent location history
1991Patents assigned to FUJITSU LTD (1)· patent assignee history
1991Based in Fukushima, JP· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| KUREHA CHEMICAL IND CO LTD | 2 | 1983–1991 |
| FUJITSU LTD | 1 | 1991 |
Locations
| Location | Patents | Span |
|---|---|---|
| Fukushima, JP | 1 | 1991 |
| Iwaki, JP | 1 | 1983 |