Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10086380 | Shredding recyclable material containing information | David Yamamoto, Justin Johns, Constantin Vasilescu, Brent Allen | 2018-10-02 |
| 8517294 | Motor vehicle for collecting paper and having battery to assist in propulsion | David Yamamoto, Allen Petten, Justin Johns, Sid Vandermeulen, Constantin Vasilescu +1 more | 2013-08-27 |