Joel D. Armstrong

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Antioch, IL, US

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Patents Grantslast 30 patents

Information Patent Grant
Dual-head duplicator with alternate simplexing capability
- Patent number 4,327,641
- Issue date May 4, 1982
- AM International, Inc.
- Eber L. Goodwin
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Grant
Pressure roller assembly
- Patent number 4,163,550
- Issue date Aug 7, 1979
- AM International, Inc.
- Joel D. Armstrong
- B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL