Issued Patents All Time
Showing 1–23 of 23 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6446406 | Direct attached grid | — | 2002-09-10 |
| 6305139 | Beam clip | — | 2001-10-23 |
| 6199343 | Connector assembly for ceiling grid | Yu Lin, Larry S. Wertz, Jr. | 2001-03-13 |
| 6178712 | Locking connection for ceiling grid system | — | 2001-01-30 |
| 5979055 | Process for producing rollformed sections | Henry G. Stein | 1999-11-09 |
| 5363622 | Fire-rated drywall suspension system | — | 1994-11-15 |
| 5347783 | Prenotched fire-rated runner | Sandor A. Frecska, Ernest B. Nute, Jr. | 1994-09-20 |
| 5313750 | Fire-rated runner | Sandor A. Frecska | 1994-05-24 |
| 4969346 | Apparatus for producing cold roll-formed structures | George F. Bosl, Patrick M. Kelly, Dennis A. Alvarez, Joseph A. Hocevar | 1990-11-13 |
| 4881355 | Cold roll-formed structures and method and apparatus for producing same | George F. Bosl, Patrick M. Kelly, Dennis A. Alvarez, Joseph A. Hocevar | 1989-11-21 |
| 4770018 | Method for producing cold roll-formed structures | George F. Bosl, Patrick M. Kelly, Dennis A. Alvarez, Joseph A. Hocevar | 1988-09-13 |
| 4628656 | Demountable wall panel | Robert J. Menchetti, Robert H. Safran | 1986-12-16 |
| 4583340 | Fixture support clip for suspension ceiling grid systems | — | 1986-04-22 |
| 4574547 | Window system for demountable walls | Robert J. Menchetti, Robert H. Safran | 1986-03-11 |
| 4531340 | Beam splice for supporting grid systems | — | 1985-07-30 |
| 4514945 | Window insulating system | Robert J. Menchetti | 1985-05-07 |
| 4484428 | Suspended ceiling grid system | — | 1984-11-27 |
| 4470239 | Suspended ceiling grid system | — | 1984-09-11 |
| RE31201 | Locking connection for supporting grid systems | — | 1983-04-12 |
| 4317318 | Supporting grid system having interchangeable T sections | — | 1982-03-02 |
| 4317641 | Locking connection for supporting grid systems | — | 1982-03-02 |
| 4208851 | Suspended ceiling system | — | 1980-06-24 |
| 4205815 | Shelf bracket, shelf bracket-stud combination and shelf bracket-clip combination | John A. Gasper | 1980-06-03 |