Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4587847 | Method for indicating concealed deposits | Erik L. Malmqvist | 1986-05-13 |
| 4468558 | Method and apparatus for measuring radon beneath and above the level of the ground | Erik L. Malmqvist | 1984-08-28 |
| 4426575 | Method and apparatus for measuring radon in the ground | Erik L. Malmqvist | 1984-01-17 |
| 4417142 | Method and apparatus for detecting alpha-emitting substances | Erik L. Malmqvist | 1983-11-22 |