Donald Firth

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Los Angeles, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Retort seal mechanism with integral bearings
- Patent number 4,361,333
- Issue date Nov 30, 1982
- Tosco Corporation
- Donald Firth
- F27 - FURNACES KILNS OVENS RETORTS
Information Patent Grant
Hydrostatic retort seal
- Patent number 4,353,558
- Issue date Oct 12, 1982
- Tosco Corporation
- Donald Firth
- F27 - FURNACES KILNS OVENS RETORTS