Engelmann; Rudolph H.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Engelmann; Rudolph H..The latest application filed is for "power factor maintenance system".
- Engelmann; Rudolph H. - Mount Prospect IL
- Engelmann; Rudolph H. - Ann Arbor MI
- Engelmann; Rudolph H. - Willmar MN
- Engelmann; Rudolph H. - St. Paul MN
| Patent | Date |
|---|---|
| Power factor maintenance system Grant 4,982,148 - Engelmann January 1, 1 | 1991-01-01 |
| End of charge detector Grant 4,779,035 - Engelmann October 18, 1 | 1988-10-18 |
| Power control system for periodically and selectively energizing or shorting primary windings of transformers for controlling the output voltage across a common secondary winding Grant 4,717,889 - Engelmann * January 5, 1 | 1988-01-05 |
| Battery charger Grant 4,716,353 - Engelmann December 29, 1 | 1987-12-29 |
| Power control system Grant 4,673,888 - Engelmann , et al. June 16, 1 | 1987-06-16 |
| Indicia producing method Grant 4,279,852 - Engelmann July 21, 1 | 1981-07-21 |
| Power supply Grant 4,219,872 - Engelmann August 26, 1 | 1980-08-26 |
| Dual priority temperature control Grant 4,138,607 - Engelmann February 6, 1 | 1979-02-06 |
| Optical character recognition device Grant 4,130,819 - Engelmann December 19, 1 | 1978-12-19 |
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