Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7168211 | Tubular skylight with dome flashing and protective waffle pattern corrugation | Joseph Prenn, David Windsor Rillie | 2007-01-30 |
| 7082726 | Butterfly valve for skylight | Joseph Prenn, Michael Muhlestein | 2006-08-01 |
| 7040061 | Tubular skylight with dome flashing and protective corrugation | David Windsor Rillie, Joseph Prenn, Michael Muhlestein | 2006-05-09 |
| 6438803 | Systems and methods for connecting skylight components | David Windsor Rillie, Joseph Prenn, Philip Edward Warren, Bing-Ling Chao | 2002-08-27 |
| 6415563 | Systems and methods for connecting skylight components | David Windsor Rillie, Joseph Prenn, Philip Edward Warren, Bing-Ling Chao | 2002-07-09 |
| 6412238 | Systems and methods for connecting skylight components | David Windsor Rillie, Joseph Prenn, Philip Edward Warren, Bing-Ling Chao | 2002-07-02 |
| 6363668 | Systems and methods for connecting skylight components | David Windsor Rillie, Joseph Prenn, Philip Edward Warren, Bing-Ling Chao | 2002-04-02 |
| 6321493 | Systems and methods for connecting skylight components | David Windsor Rillie, Joseph Prenn, Philip Edward Warren, Bing-Ling Chao | 2001-11-27 |
| 6219977 | Tubular skylight with round-to-square adaptor | Bing-Ling Chao, Joseph Prenn | 2001-04-24 |
| 6035593 | Tubular skylight with snap assembly and expansion spacer | Bing-Ling Chao, David Windsor Rillie, Joseph Prenn | 2000-03-14 |
| 5896713 | Tubular skylight with vertically adjustable tube and improved roof cover seal | Bing-Ling Chao, David Windsor Rillie, Joseph Prenn | 1999-04-27 |