Erth; Richard A.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Erth; Richard A..The latest application filed is for "safety helmet assembly".
- Erth; Richard A. - Wexford PA
- Erth; Richard A. - York PA
| Patent | Date |
|---|---|
| Safety helmet assembly Grant 6,317,895 - Erth , et al. November 20, 2 | 2001-11-20 |
| Capacity control systems for inverter-driven centrifugal compressor based water chillers Grant 4,546,618 - Kountz , et al. October 15, 1 | 1985-10-15 |
| Capacity control systems for screw compressor based water chillers Grant 4,351,160 - Kountz , et al. September 28, 1 | 1982-09-28 |
| Inverter-motor system with different control characteristics for inverter voltage and frequency Grant 4,317,074 - Erth February 23, 1 | 1982-02-23 |
| Control system for regulating large capacity rotating machinery Grant 4,282,719 - Kountz , et al. August 11, 1 | 1981-08-11 |
| Evaporator inlet water temperature control system Grant 4,282,718 - Kountz , et al. August 11, 1 | 1981-08-11 |
| Control system for regulating large capacity rotating machinery Grant 4,151,725 - Kountz , et al. May 1, 1 | 1979-05-01 |
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