Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D386237 | Double helix ladder | Gary Max, Wesley D. Sutton, Thomas Robert Norquist, Hollis Gentry | 1997-11-11 |
| 4989381 | Ventilated door light | David A. De Block | 1991-02-05 |
| 4920718 | Integral door light and related door construction | Steven R. Wilkening | 1990-05-01 |
| 4897975 | Integral door light with glazing stop | Steven R. Wilkening, Leslie L. Pallin | 1990-02-06 |
| D305069 | Door light frame | David A. De Block | 1989-12-12 |
| 4884376 | Sun porch | David A. DeBlock | 1989-12-05 |
| 4872498 | Venting door light with insulated glass | David A. DeBlock | 1989-10-10 |
| 4779518 | Whole house ventilating method, system and appartus | Steven A. Leonard | 1988-10-25 |
| D295354 | Window shade | David A. De Block | 1988-04-26 |
| D281273 | Self-closing ventilation louver | — | 1985-11-05 |
| D281194 | Self-closing ventilation louver | — | 1985-10-29 |
| D273045 | Basement window cover | — | 1984-03-13 |