Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5329467 | Distance measuring method and apparatus therefor | Akio Nagamune, Kouichi Tezuka | 1994-07-12 |
| 5323114 | Method and apparatus for obtaining sectional information of the underground by measuring time differences and strength of electromagnetic signals | Akio Nagamune, Koichi Tezuka | 1994-06-21 |