Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4848232 | Method of electrically blasting a plurality of detonators and electric blasting apparatus for use in said method | Takeo Ueda, Yoshiro Osumi | 1989-07-18 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4848232 | Method of electrically blasting a plurality of detonators and electric blasting apparatus for use in said method | Takeo Ueda, Yoshiro Osumi | 1989-07-18 |