Ewald; Ronald F.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Ewald; Ronald F..The latest application filed is for "variable spray valve assembly".
- Ewald; Ronald F. - Rolling Meadows IL
- Ewald; Ronald F. - Rollings Meadows IL
| Patent | Date |
|---|---|
| Variable spray valve assembly Grant 4,139,128 - Ewald February 13, 1 | 1979-02-13 |
| Double seal valve stem Grant 4,013,197 - Ewald March 22, 1 | 1977-03-22 |
| Finger pump Grant 3,910,458 - Ewald October 7, 1 | 1975-10-07 |
| Low delivery rate valve Grant 3,893,597 - Ewald July 8, 1 | 1975-07-08 |
| Child safety closure for aerosol containers Grant 3,885,717 - Ewald May 27, 1 | 1975-05-27 |
| Safety Closure Adaptor Grant 3,779,427 - Ewald December 18, 1 | 1973-12-18 |
| Safety Closure Grant 3,770,167 - Ewald November 6, 1 | 1973-11-06 |
| Co-dispensing Valve Grant 3,690,515 - Ewald September 12, 1 | 1972-09-12 |
| Tilt Valve Grant 3,658,294 - Ewald April 25, 1 | 1972-04-25 |
| Valve Button With Aspirator Passageway Grant 3,648,932 - Ewald , et al. March 14, 1 | 1972-03-14 |
| Self-cleaning Valve Grant 3,612,361 - Ewald , et al. October 12, 1 | 1971-10-12 |
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