Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5153520 | Identifying and quantifying the presence of alpha radiation and specific gaseous molecules present in air samples | — | 1992-10-06 |
| 4972081 | Detection of contaminants in air | — | 1990-11-20 |
| 4915020 | Radon control in dwellings | — | 1990-04-10 |
| 4868546 | Radon detector | — | 1989-09-19 |
| 4586146 | Grinding mill control system | Phillip W. Welch | 1986-04-29 |
| 4567939 | Computer controlled air conditioning systems | — | 1986-02-04 |
| 4557084 | Energy efficient building with underground concrete walls | — | 1985-12-10 |
| 4495448 | Means and method of sensing motor rotation speed from stray escaping flux | — | 1985-01-22 |
| 4404640 | Grinding mill monitoring instrumentation | Phillip W. Welch | 1983-09-13 |
| 4333268 | Energy saving electrically actuated barrier gate control means operable from solar energy | — | 1982-06-08 |
| 4324947 | Solar energy collector system | — | 1982-04-13 |
| 4275711 | Solar energy collector system | — | 1981-06-30 |
| 4194129 | Armature slip analysis of induction motors with temperature and voltage correction | — | 1980-03-18 |
| 4194178 | Electric motor with internal wireless load monitor | — | 1980-03-18 |