Inventor
Nobuyoshi Yamazaki
Inventor
Tokyo, JP
Overview
Patents· 4 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
E21Bprimary
E21BEarth or rock drilling40%
G01BMeasuring length, thickness or similar linear dimensions20%
G01CMeasuring distances, levels or bearings20%
G01MTesting static or dynamic balance of machines or structures20%
PatentTitleYear
6,498,478'Azimuth measuring method, azimuth measuring apparatus, position measuring method, and position measuring apparatus'20025,565,860'Underground information collecting apparatus having a noise cancel function'19965,540,085'Method of measuring leakage position in impervious bottom sheet using electrodes mounted on both surfaces of the sheet and apparatus therefor'19964,800,385'Well data transmission system using a magnetic drill string for transmitting data as a magnetic flux signal'1989Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1989–2002Patents assigned to SAKATA DENKI CO LTD (4)· patent assignee history
1989–2002Patents assigned to RADIC CO LTD (3)· patent assignee history
1989–1996Based in Tokyo, JP· patent location history
1996Patents assigned to MAEDA CONSTRUCTION (1)· patent assignee history
2002Based in Kodaira, JP· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| SAKATA DENKI CO LTD | 4 | 1989–2002 |
| RADIC CO LTD | 3 | 1989–2002 |
| MAEDA CONSTRUCTION | 1 | 1996 |
Locations
| Location | Patents | Span |
|---|---|---|
| Tokyo, JP | 3 | 1989–1996 |
| Kodaira, JP | 1 | 2002 |