| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 3 | |
| #2 | EPO (European Patent Office) | 2 | |
| #3 | United States | 2 | |
| #4 | Australia | 1 | |
| #5 | Bulgaria | 1 | |
| #6 | Brazil | 1 | |
| #7 | China | 1 | |
| #8 | Czechia | 1 | |
| #9 | German Democratic Republic | 1 | |
| #10 | Denmark | 1 | |
| #11 | Finland | 1 | |
| #12 | Croatia | 1 | |
| #13 | Hungary | 1 | |
| #14 | Japan | 1 | |
| #15 | Republic of Korea | 1 | |
| #16 | Lithuania | 1 | |
| #17 | Latvia | 1 | |
| #18 | Mexico | 1 | |
| #19 | New Zealand | 1 | |
| #20 | Romania | 1 | |
| #21 | Slovenia | 1 | |
| #22 | USSR (Union of Socialist Soviet Republics) | 1 | |
| #23 | Yugoslavia (Serbia and Montenegro) | 1 |
| # | Industry | |
|---|---|---|
| #1 | Machines | |
| #2 | Machine tools | |
| #3 | Materials and metallurgy | |
| #4 | Surface technology and coating |
| # | Technology | |
|---|---|---|
| #1 | Unspecified technologies | |
| #2 | Milling | |
| #3 | Accessories for machine tools | |
| #4 | Alloys | |
| #5 | Layered products |
| # | Name | Total Patents |
|---|---|---|
| #1 | Steffens Michael | 19 |
| #2 | Steffens Gustav Walter | 2 |
| #3 | Steffens M | 2 |
| #4 | Gusutafu Buarutaa Shiyutefuens | 1 |
| #5 | Steffens Gustav W | 1 |
| #6 | Giyuntaa Bueebaa | 1 |
| #7 | Michael Steffens | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE3937031C1 | Conversion of work material to martensitic chromium steel - for prepn. of sharp knives | |
| SI8811693A | Cuttering head for cutter | |
| DE3732237C1 | Cutter head for cutters | |
| DE3632805A1 | BALANCING ARRANGEMENT FOR CUTTER KNIFE HEADS |