Robert K. Hewelt

Follow

Person

Leonard, MI, US

People

Patents Grantslast 30 patents

Information Patent Grant
Arrangement for eliminating ammonia vapors from developed diazo cop...
- Patent number 4,371,247
- Issue date Feb 1, 1983
- Hewelt; Robert K.
- Robert K. Hewelt
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Method and arrangement for eliminating ammonia vapors from develope...
- Patent number 4,273,435
- Issue date Jun 16, 1981
- Hewelt; Robert K.
- Robert K. Hewelt
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY