| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 4 | |
| #2 | France | 2 | |
| #3 | Japan | 2 | |
| #4 | United States | 2 | |
| #5 | Canada | 1 | |
| #6 | German Democratic Republic | 1 | |
| #7 | United Kingdom | 1 |
| # | Industry | |
|---|---|---|
| #1 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Milling | |
| #2 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Wigand Gerhard | 8 |
| #2 | Geruharuto Buiiganto | 2 |
| Publication | Filing date | Title |
|---|---|---|
| DE3329339A1 | Apparatus for destroying ribbon cassettes and the like | |
| CA1138399A | Device for the destruction of microfilms and the like | |
| DE2815973A1 | Microfilm destroying machine with chopper blades - has low friction coating on feed surfaces and suction fan to remove particles from cutting zone | |
| DE2717522A1 | Shredder for microfilm - in which fed material is brushed shredded between cutters and profiled plate and withdrawn by fan | |
| DE2641370A1 | DEVICE FOR DESTRUCTION OF MICROFILMS AND THE LIKE |