Richard W. Hradek

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Davenport, IA, US

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Patents Grantslast 30 patents

Information Patent Grant
Oxygen concentrator with pressure booster and oxygen concentration...
- Patent number 5,071,453
- Issue date Dec 10, 1991
- Litton Systems, Inc.
- Richard W. Hradek
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Rotary valve for an oxygen generator
- Patent number 3,948,286
- Issue date Apr 6, 1976
- The Bendix Corporation
- Jack E. Dunbar
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE