Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6746350 | Practice hockey puck | Michael James Hartman, Arthur Kleinpell | 2004-06-08 |
| 6638188 | Practice hockey puck | Michael James Hartman, Arthur Kleinpell | 2003-10-28 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6746350 | Practice hockey puck | Michael James Hartman, Arthur Kleinpell | 2004-06-08 |
| 6638188 | Practice hockey puck | Michael James Hartman, Arthur Kleinpell | 2003-10-28 |