Issued Patents All Time
Showing 1–24 of 24 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5673524 | Reversible composite building panel | — | 1997-10-07 |
| 5191743 | Concealing trim cap assembly for a wall or ceiling panel system | — | 1993-03-09 |
| 5050360 | Suspended ceiling panel | — | 1991-09-24 |
| 5024034 | Non-directional suspended ceiling panels | — | 1991-06-18 |
| 4991370 | Security panel system | Thomas O. Johnstone | 1991-02-12 |
| 4850172 | Ceiling or like structural system and splice member therefor | Thomas O. Johnstone, Frank Malachowski | 1989-07-25 |
| 4736564 | Conversion ceiling pan and system | — | 1988-04-12 |
| 4494346 | Ceiling system and panel-securing device therefor | — | 1985-01-22 |
| 4483116 | Ceiling system with ceiling conversion strip | — | 1984-11-20 |
| 4426822 | Vertical ceiling assembly and stringer therefor | — | 1984-01-24 |
| 4411215 | Apparatus for producing striped surface coatings | Carl A. Wollam | 1983-10-25 |
| 4411218 | Apparatus for producing straited surface coatings | Carl A. Wollam, Alexander F. Chalmers | 1983-10-25 |
| 4387123 | Coating process and apparatus | Carl A. Wollam | 1983-06-07 |
| 4382354 | Siding panel systems with panel-mounting devices | Carl A. Wollam | 1983-05-10 |
| 4364215 | Suspended ceiling assembly and stabilizer bar therefor | Carl A. Wollam | 1982-12-21 |
| 4356673 | Siding panel systems and methods of installation | — | 1982-11-02 |
| 4356216 | Process for producing striped surface coatings | Carl A. Wollam | 1982-10-26 |
| 4356217 | Process for producing striated surface coatings | Carl A. Wollam, Alexander A. Chalmers | 1982-10-26 |
| 4344990 | Process and apparatus for coating strip articles and the like | Carl A. Wollam, Alexander A. Chalmers | 1982-08-17 |
| 4292781 | Siding panel system with modular insulating and mounting units | Alexander A. Chalmers | 1981-10-06 |
| 4288958 | Horizontal siding panel system with vertical stringers | Alexander A. Chalmers | 1981-09-15 |
| 4228629 | Vertical siding system | Alexander A. Chalmers, James Arlie Englund, Stephen Popek | 1980-10-21 |
| 4195455 | Adjustable soffit system | Alexander A. Chalmers | 1980-04-01 |
| 4193238 | Window casing cover | Alexander A. Chalmers, Carl A. Wollam | 1980-03-18 |