| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Switzerland | 5 | |
| #2 | United Kingdom | 4 | |
| #3 | Spain | 3 | |
| #4 | Austria | 2 | |
| #5 | Canada | 2 | |
| #6 | Denmark | 2 | |
| #7 | United States | 2 |
| # | Industry | |
|---|---|---|
| #1 | Materials and metallurgy | |
| #2 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Alloys | |
| #2 | Unspecified technologies | |
| #3 | Metal tempering |
| # | Name | Total Patents |
|---|---|---|
| #1 | Kuehnrich Paul Richard | 12 |
| #2 | Paul Richard Kuehnrich | 5 |
| Publication | Filing date | Title |
|---|---|---|
| CA179208A | Steel | |
| US1277431A | Steel. | |
| GB106187A | An Improved Steel. | |
| US1273877A | Alloy. | |
| GB191514939A | An Improved Alloy. | |
| GB191111063A | An Improved Steel. | |
| GB190606283A | Improvements in or relating to Electric Furnaces. | |
| CA215365A | High speed too steel |