Richard D. Learn

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South River, NJ, US

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Patents Grantslast 30 patents

Information Patent Grant
Clasp assembly
- Patent number 4,158,904
- Issue date Jun 26, 1979
- Duchess Mfg. Corp.
- Richard D. Learn
- A44 - HABERDASHERY JEWELLERY
Information Patent Grant
Link chain
- Patent number 4,051,668
- Issue date Oct 4, 1977
- Duchess Mfg. Corporation
- Richard D. Learn
- A44 - HABERDASHERY JEWELLERY