Alfred Walter

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Schlieren, CH

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Patents Grantslast 30 patents

Information Patent Grant
Apparatus for perforating a paper sample
- Patent number 4,231,273
- Issue date Nov 4, 1980
- Alfred Walter AG
- Alfred Walter
- G01 - MEASURING TESTING
Information Patent Grant
Testing apparatus for multiple copy form sets
- Patent number 4,203,320
- Issue date May 20, 1980
- Alfred Walter AG
- Alfred Walter
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Grant
Method of and apparatus for measuring the flexural stiffness of a s...
- Patent number 4,179,941
- Issue date Dec 25, 1979
- Alfred Walter AG
- Alfred Walter
- G01 - MEASURING TESTING
Information Patent Grant
Apparatus for testing the burst strength of a line of perforations
- Patent number 4,133,203
- Issue date Jan 9, 1979
- Alfred Walter AG
- Alfred Walter
- G01 - MEASURING TESTING
Information Patent Grant
Apparatus for testing a forms set for print through quality
- Patent number 4,122,702
- Issue date Oct 31, 1978
- Alfred Walter AG
- Alfred Walter
- G01 - MEASURING TESTING