Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4989890 | Length and width adjustable wheelchair | Walter G. Lockard, Herbert J. Hoekstra, Allen J. Boris | 1991-02-05 |
| 4813693 | Adjustable child's wheelchair | Walter G. Lockard, Herbert J. Hoekstra, Allen J. Boris | 1989-03-21 |