Edward M. Springer

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Chicago, IL, US

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Patents Grantslast 30 patents

Information Patent Grant
Electronic stencil cutter
- Patent number 4,330,798
- Issue date May 18, 1982
- Arthur J. Heyer
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Grant
Electronic stencil cutter
- Patent number 4,319,253
- Issue date Mar 9, 1982
- Heyer Inc.
- Arthur J. Heyer
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Grant
Electronic stencil cutter having means to vary size of reproduced p...
- Patent number 4,268,869
- Issue date May 19, 1981
- Heyer Inc.
- Arthur J. Heyer
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Grant
Duplicating machine
- Patent number 4,030,412
- Issue date Jun 21, 1977
- Heyer Inc.
- Edward M. Springer
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Grant
Stencil gripping apparatus for a duplicating machine
- Patent number 3,941,054
- Issue date Mar 2, 1976
- Heyer Inc.
- Edward M. Springer
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS