Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4853536 | Ionization chamber for monitoring radioactive gas | Payasada Kotrappa | 1989-08-01 |
| 4814608 | Subsoil radioactive gas measuring system | Payasada Kotrappa | 1989-03-21 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4853536 | Ionization chamber for monitoring radioactive gas | Payasada Kotrappa | 1989-08-01 |
| 4814608 | Subsoil radioactive gas measuring system | Payasada Kotrappa | 1989-03-21 |