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Patent applications and USPTO patent grants for Ellsberg; Thomas R..The latest application filed is for "retrofit, newspaper tracking audit system for newspaper rack machines".
Patent | Date |
---|---|
Retrofit, newspaper tracking audit system for newspaper rack machines Grant 4,845,484 - Ellsberg July 4, 1 | 1989-07-04 |
Security system Grant 4,698,630 - Ellsberg October 6, 1 | 1987-10-06 |
Vehicle lock release mechanism operable with a safety interlock system Grant 4,430,685 - Ellsberg February 7, 1 | 1984-02-07 |
Safety interlock system Grant 4,233,642 - Ellsberg November 11, 1 | 1980-11-11 |
Safety interlock system Grant 4,158,874 - Ellsberg June 19, 1 | 1979-06-19 |
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