Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D1006928 | Golf tee | — | 2023-12-05 |
| 11135488 | Multi-purpose golf tee | — | 2021-10-05 |
| 7169831 | Pavement marking composition comprising ceramic fibers | Randall H. Helland | 2007-01-30 |
| 6841223 | Composite pavement markings | Thomas P. Heblom | 2005-01-11 |
| 6561309 | Gas flow generator and apparatus for using the same | Robert J. Gustafson | 2003-05-13 |
| 6479132 | Pavement marking articles having enhanced retroreflectivity under dry or wet conditions and method for making same | Thomas P. Hedblom, Terry L. Bescup, Joseph M. McGrath | 2002-11-12 |
| 6431788 | Wear resistant pavement marking | Thomas P. Hedblom, Curtis W. Meverden, Gregory E. Gilligan, Thomas Krech | 2002-08-13 |
| 6365262 | Pavement marking articles having enhanced retroreflectivity under dry or wet conditions and method for making same | Thomas P. Hedblom, Terry L. Bescup, Joseph M. McGrath | 2002-04-02 |
| 6247818 | Method for making retroreflective elements having enhanced retroreflectivity under dry and/or wet conditions | Thomas P. Hedblom | 2001-06-19 |
| 6101808 | Cryogenic solid hybrid rocket engine and method of propelling a rocket | William H. Knuth, Darin R. Kohles, Christopher P. St. Clair, Daniel J. Gramer | 2000-08-15 |
| 6051297 | Self-contrasting retroreflective pavement marking tapes | Gary W. Maier | 2000-04-18 |