Inventor
Sadao Minakawa
Inventor
Mito, JP
Overview
Patents· 7 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
G01Jprimary
G01JMeasurement of intensity, velocity, spectral content, polarisation, phase or pulse characteristics of infrared, visible or ultraviolet light57%
G01NInvestigating or analysing materials by determining their chemical or physical properties29%
G01LMeasuring force, stress, torque, work, mechanical power, mechanical efficiency, or fluid pressure14%
PatentTitleYear
5,276,499'Spectrophotometer'1994D0325176'Spectro photometer'1992D0323437'Control table for spectro photometer'19925,041,727'Spectrophotometer with near infrared radiation sensor having an improved sensitivity'19914,981,357'Spectrophotometer having functions of both a double-monochromater and a single-monochromater'19914,810,872'Optical property measuring device'19894,810,089'Photoelastic effect measuring device'1989Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1989–1994Patents assigned to HITACHI LTD (7)· patent assignee history
1989–1994Based in Mito, JP· patent location history
1994Patents assigned to HITACHI INSTRUMENTS ENG (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| HITACHI LTD | 7 | 1989–1994 |
| HITACHI INSTRUMENTS ENG | 1 | 1994 |
Locations
| Location | Patents | Span |
|---|---|---|
| Mito, JP | 7 | 1989–1994 |