Henry Haardt

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Henryville, PA, US

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Patents Grantslast 30 patents

Information Patent Grant
Tricurve optical metal master mold and method of making
- Patent number 4,681,295
- Issue date Jul 21, 1987
- International Hydron Corporation
- Henry Haardt
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Molds and procedure for producing truncated contact lenses
- Patent number 4,407,766
- Issue date Oct 4, 1983
- National Patent Development Corporation
- Henry Haardt
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL