Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10703567 | Storage material handling system | Charles M. Grinnell, Joe Jones, John Kawola, Mary Ellen Sparrow, Stephen C. Toebes +1 more | 2020-07-07 |
| 10399777 | Storage material handling system | Charles M. Grinnell, Joe Jones, John Kawola, Mary Ellen Sparrow, Stephen C. Toebes +1 more | 2019-09-03 |
| 10040630 | Storage material handling system | Charles M. Grinnell, Joe Jones, John Kawola, Mary Ellen Sparrow, Stephen C. Toebes +1 more | 2018-08-07 |
| 9694977 | Storage material handling system | Charles M. Grinnell, Joe Jones, John Kawola, Mary Ellen Sparrow, Stephen C. Toebes +1 more | 2017-07-04 |