Sing C. J. Yuen

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Hong Kong, HK

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Patents Grantslast 30 patents

Information Patent Grant
Toy washing machine
- Patent number 4,341,034
- Issue date Jul 27, 1982
- Arco Industries Ltd.
- Kwok W. Tsui
- A63 - SPORTS GAMES AMUSEMENTS
Information Patent Grant
Spelling machine
- Patent number 4,340,373
- Issue date Jul 20, 1982
- Arco Industries Ltd.
- Bruce M. D'Andrade
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Grant
Toy dryer
- Patent number 4,338,741
- Issue date Jul 13, 1982
- Arco Industries Ltd.
- Kwok W. Tsui
- A63 - SPORTS GAMES AMUSEMENTS