Alfred C. Roth

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Ann Arbor, MI, US

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Patents Grantslast 30 patents

Information Patent Grant
Chalk dispenser
- Patent number 5,520,309
- Issue date May 28, 1996
- Alfred C. Roth
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
Information Patent Grant
Thread tap
- Patent number 5,037,251
- Issue date Aug 6, 1991
- Alfred C. Roth
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Tapper/threader assembly
- Patent number 4,879,929
- Issue date Nov 14, 1989
- Alfred C. Roth
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR