Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5423576 | Corner pieces for improved duct connector | — | 1995-06-13 |
| 5356184 | Corner pieces for improved duct connector | — | 1994-10-18 |
| 5275449 | Elongated member for joining ducts | — | 1994-01-04 |
| 5253901 | Duct reinforcement | — | 1993-10-19 |
| 4936069 | Modular building panel having an improved offset thermal barrier joint | Jack A. Brady, John L. Drane | 1990-06-26 |
| 4461499 | Transverse joint system for sheet metal ducts | Robert H. Hudson | 1984-07-24 |
| 4193780 | Air filter construction | Worth B. Cotton, Jr. | 1980-03-18 |