| Number | Name | Date | Kind |
|---|---|---|---|
| D185440 | Kunkle | Jun 1959 | |
| 2813258 | Klumpp, Jr. | Nov 1957 | |
| 2993189 | Schelke et al. | Jul 1961 | |
| 3377613 | Archer | Apr 1968 |
| Number | Date | Country |
|---|---|---|
| 1007316 | Mar 1977 | CAX |
| 421225 | Sep 1966 | CHX |
| Entry |
|---|
| J. Philip Industries' Sales brochure dated 4-2-1979, Plug Model #'S JP-3M and JP-3FB. |