Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6253558 | Method and system for creating and maintaining a frozen surface | Robert Stillwell | 2001-07-03 |
| 5970734 | Method and system for creating and maintaining a frozen surface | Robert Stillwell | 1999-10-26 |
| 5133139 | Ice resurfacing spreader | — | 1992-07-28 |
| 5010127 | Additive composition for treating water used to form ice and methods | — | 1991-04-23 |
| 4953360 | Additive for treating water used to form ice | — | 1990-09-04 |
| 4944103 | Spreader attachment apparatus | — | 1990-07-31 |