Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5463222 | Thermal imaging system for internal combustion engines | Jon M. Lesko, James A. Keller | 1995-10-31 |
| 4630317 | Sweat band apparatus | Jerry H. Lisle | 1986-12-23 |
| 4547903 | Sweat band apparatus | Jerry H. Lisle | 1985-10-22 |
| D258499 | Mine roof warning indicator | Robert G. Hamm | 1981-03-10 |
| 4226115 | Remote controlled air sampler | Ralph E. Williams, Robert P. Marchese, Philip A. Russell, James A. Armstrong | 1980-10-07 |
| 4217849 | Mine roof warning indicator | Robert G. Hamm | 1980-08-19 |