Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5742378 | Electronic leveling apparatus and leveling staff used with the same | Kaoru Kumagai, Shinji Kawashima, Fumio Ohtomo | 1998-04-21 |
| 5537200 | Electronic leveling apparatus having a leveling staff detection function, and leveling staff used with the same | Kaoru Kumagai, Shinji Kawashima, Fumio Ohtomo | 1996-07-16 |
| 5537201 | Electronic leveling system, electronic leveling apparatus and leveling staff | Kaoru Kumagai, Shinji Kawashima, Fumio Ohtomo | 1996-07-16 |
| 4325638 | Electro-optical distance measuring apparatus | Harumi Takeda, Susumu Takahashi, Hiroshi Tamaki | 1982-04-20 |