| Number | Name | Date | Kind |
|---|---|---|---|
| D. 159415 | Hitchcock | Jul 1950 | |
| 2673545 | Insul | Mar 1954 | |
| 3303717 | Valenti | Feb 1967 |
| Entry |
|---|
| Modern Plastic Encyclopedia; p. 1401; Knob JJ, 1948.* |
| Modern Plastics Encyclopedia; p. 1416; Knob M, 1948.* |
| U.S. application No. 29/105,175, filed May 19, 1999, pending. |
| U.S. application No. 29/105,173, filed May 19, 1999, pending. |
| U.S. application No. 29/105,170, filed May 19, 1999, pending. |