Inventor
Hiroaki Hanafusa
Inventor
Mito, JP
Overview
Patents· 6 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
G02Bprimary
G02BOptical elements, systems or apparatus67%
Y10TTechnical subjects covered by former us classification22%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests11%
PatentTitleYear
5,332,535'Method of fabricating a dielectric multilayer filter'19945,234,772'Dielectric multilayer, filter, manufacturing method therefor, and optical element incorporating the same'19935,101,462'Wide-band optical fiber coupler and its manufacturing method'19925,095,516'Wide-band optical fiber coupler and its manufacturing method'19925,009,478'Method for the manufacture of an optical fiber coupler'19914,869,570'Fiber coupler and method and apparatus for manufacturing the same'1989Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1989–1994Patents assigned to NIPPON TELEGRAPH & TELEPHONE (6)· patent assignee history
1989Based in Ibaraki, JP· patent location history
1991–1992Patents assigned to JAPAN AVIATION ELECTRON (3)· patent assignee history
1991–1994Based in Mito, JP· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| NIPPON TELEGRAPH & TELEPHONE | 6 | 1989–1994 |
| JAPAN AVIATION ELECTRON | 3 | 1991–1992 |
Locations
| Location | Patents | Span |
|---|---|---|
| Mito, JP | 5 | 1991–1994 |
| Ibaraki, JP | 1 | 1989 |