Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7312439 | Radon progeny monitor | Lorin R. Stieff, John C. Dempsey | 2007-12-25 |
| D327121 | Small volume ion chamber | Robert W. Ramsey, Jr. | 1992-06-16 |
| 5055674 | Electret ionization chamber for monitoring radium and dissolved radon in water | — | 1991-10-08 |
| 4992658 | Electret ion chamber for radon monitoring | Robert W. Ramsey, Jr. | 1991-02-12 |
| 4853536 | Ionization chamber for monitoring radioactive gas | John C. Dempsey | 1989-08-01 |
| 4814608 | Subsoil radioactive gas measuring system | John C. Dempsey | 1989-03-21 |