Issued Patents All Time
Showing 26–33 of 33 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5651231 | Valving | — | 1997-07-29 |
| 5618016 | Swing linkage | George A. Wood | 1997-04-08 |
| 5544372 | Ball and socket joint, useful with collapsible playpens | Robert A. Kolich, Charles W. Paddock, James P. Bicheler | 1996-08-13 |
| 5518475 | Baby walker | — | 1996-05-21 |
| 5363521 | Collapsible playpen | Robert A. Kolich, Charles W. Paddock, James P. Bicheler | 1994-11-15 |
| 4883249 | Counterbalancing | — | 1989-11-28 |
| 4763580 | Supporting | — | 1988-08-16 |
| 4731022 | Teaching arithmetic principles | — | 1988-03-15 |