Inventor
Yo Tajima
Inventor
Nagoya, JP
Overview
Patents· 11 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
C04Bprimary
C04BLime, magnesia67%
G02BOptical elements, systems or apparatus17%
G01JMeasurement of intensity, velocity, spectral content, polarisation, phase or pulse characteristics of infrared, visible or ultraviolet light8%
G01NInvestigating or analysing materials by determining their chemical or physical properties8%
PatentTitleYear
5,858,899'Aluminum oxide based sintered body'19995,527,746'Method for manufacturing an aluminum oxide sintered body'19965,406,371'Apparatus for measuring birefringence and retardation'19955,326,733'Silicon nitride sintered product excellent in wear resistance'19945,286,684'Aluminum oxide-based sintered object and process for producing the same'19945,114,888'Silicon nitride sintered body and method for producing same'19925,049,531'Silicon nitride sintered body'19915,032,554'Sintered silicon nitride products'19914,897,537'Automatic focus adjusting system of microscope employed in surface inspection apparatus'19904,880,756'Silicon nitride sintered product'19894,829,374'Surface inspection apparatus'1989Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1989–1999Patents assigned to NGK SPARK PLUG CO (8)· patent assignee history
1989–1990Patents assigned to KANZAKI PAPER MFG CO LTD (2)· patent assignee history
1989–1996Based in Aichi, JP· patent location history
1989–1990Based in Ashiya-shi, JP· patent location history
1991–1999Based in Nagoya, JP· patent location history
1995Patents assigned to NEW OJI PAPER CO LTD (1)· patent assignee history
1995Based in Ashiya, JP· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| NGK SPARK PLUG CO | 8 | 1989–1999 |
| KANZAKI PAPER MFG CO LTD | 2 | 1989–1990 |
| NEW OJI PAPER CO LTD | 1 | 1995 |
Locations
| Location | Patents | Span |
|---|---|---|
| Nagoya, JP | 4 | 1991–1999 |
| Aichi, JP | 4 | 1989–1996 |
| Ashiya-shi, JP | 2 | 1989–1990 |
| Ashiya, JP | 1 | 1995 |