Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8870486 | Exchangeable attachments and apparatus and methods for retaining exchangeable attachments | Robert Castro | 2014-10-28 |
| D630682 | Writing implement with attachments | Robert Castro | 2011-01-11 |