| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 9 | |
| #2 | Germany | 1 | |
| #3 | France | 1 | |
| #4 | United Kingdom | 1 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Machines | |
| #3 | Transport | |
| #4 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Gearing | |
| #2 | Vehicle transmission mounting | |
| #3 | Unspecified technologies | |
| #4 | Finishing work on buildings |
| # | Name | Total Patents |
|---|---|---|
| #1 | John Krohn | 9 |
| #2 | Krohn John | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2542418A | Awning | |
| US2046878A | Automatic power transmission | |
| US2046877A | Automatic power transmission | |
| US1483606A | Differential gearing | |
| US1392508A | Mechanical movement | |
| US1384839A | Mechanical movement | |
| GB139607A | Improvements in differential mechanism | |
| US1413856A | Differential gear | |
| US1413855A | Differential gearing | |
| US1399019A | Vehicle drive mechanism |