Chang C. Chen

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Pan Chiao Shih, Taipei Hsien, TW

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Patents Grantslast 30 patents

Information Patent Grant
Automatic trap for catching cockroach
- Patent number 4,266,363
- Issue date May 12, 1981
- Chang C. Chen
- A01 - AGRICULTURE FORESTRY ANIMAL HUSBANDRY HUNTING TRAPPING FISHING
Information Patent Grant
Automatic animal-trapping device
- Patent number 4,255,891
- Issue date Mar 17, 1981
- Chang C. Chen
- A01 - AGRICULTURE FORESTRY ANIMAL HUSBANDRY HUNTING TRAPPING FISHING