Duane E. Harrington

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San Francisco, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Cat box litter screening device
- Patent number 4,312,295
- Issue date Jan 26, 1982
- Duane E. Harrington
- A01 - AGRICULTURE FORESTRY ANIMAL HUSBANDRY HUNTING TRAPPING FISHING
Information Patent Grant
Paper wiring apparatus
- Patent number 4,259,140
- Issue date Mar 31, 1981
- Duane E. Harrington
- A24 - TOBACCO CIGARS CIGARETTES SMOKERS' REQUISITES
Information Patent Grant
Paper wiring transport apparatus and process
- Patent number 4,242,170
- Issue date Dec 30, 1980
- Harrington; Duane E.
- Duane E. Harrington
- A24 - TOBACCO CIGARS CIGARETTES SMOKERS' REQUISITES