Johnston; Mack S.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Johnston; Mack S..The latest application filed is for "keg tapper".
- Johnston; Mack S. - Harbor City CA
- Johnston; Mack S. - Rolling Hills CA
| Patent | Date |
|---|---|
| Keg tapper Grant 4,728,010 - Johnston March 1, 1 | 1988-03-01 |
| Keg adapter valve Grant 3,913,608 - Johnston October 21, 1 | 1975-10-21 |
| Series tapper assembly and method Grant 3,908,861 - Johnston September 30, 1 | 1975-09-30 |
| Keg tapping device Grant 3,905,522 - Johnston September 16, 1 | 1975-09-16 |
| Washing, Filling And Tapping Valve Assembly Grant 3,880,206 - Johnston April 29, 1 | 1975-04-29 |
| Dynamite Detonator Assembly Grant 3,793,954 - Johnston February 26, 1 | 1974-02-26 |
| Washing, Filling And Tapping Valve Assembly Grant 3,753,445 - Johnston August 21, 1 | 1973-08-21 |
| Tapping Device For Beer Kegs And The Like Grant 3,743,145 - Johnston July 3, 1 | 1973-07-03 |
| Portable Beer Siphon Device Grant 3,720,355 - Johnston March 13, 1 | 1973-03-13 |
| Keg Tapping Device With Automatic Gas Shutoff Valve Grant 3,698,417 - Smith , et al. October 17, 1 | 1972-10-17 |
| Keg Tapping Device Grant 3,637,117 - Johnston January 25, 1 | 1972-01-25 |
| Tapping Device For Beer Kegs And The Like Grant 3,632,023 - Johnston January 4, 1 | 1972-01-04 |
| Tapping Device For Beer Kegs And The Like Grant 3,610,478 - Johnston October 5, 1 | 1971-10-05 |
| Tapping Device For Beer Kegs And The Like Grant 3,608,790 - Johnston September 28, 1 | 1971-09-28 |
| Keg Tapping Device Grant 3,599,843 - Johnston August 17, 1 | 1971-08-17 |
| Tapping Device For Beer Kegs And The Like Grant 3,591,058 - Johnston July 6, 1 | 1971-07-06 |
| Tapping Device For Beer Kegs And The Like Grant 3,591,057 - Johnston July 6, 1 | 1971-07-06 |
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