Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D603102 | Protective fielders face guard for softball and baseball | Michael Allan Polstein, Matthew Evan Polstein, Jason Polstein, Lauren Polstein | 2009-10-27 |
| D602647 | Protective helmet mask | Michael Allan Polstein, Jason Polstein, Matthew Polstein, Lauren Polstein | 2009-10-20 |