| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 9 | |
| #2 | United Kingdom | 3 | |
| #3 | France | 2 | |
| #4 | Switzerland | 1 |
| # | Industry | |
|---|---|---|
| #1 | Machine tools | |
| #2 | Transport | |
| #3 | Electrical machinery and energy | |
| #4 | Mechanical elements | |
| #5 | Agriculture |
| # | Technology | |
|---|---|---|
| #1 | Tools for connecting or disengaging | |
| #2 | Electrically-conductive connections | |
| #3 | Harvesting | |
| #4 | Cycles | |
| #5 | Rolling metal | |
| #6 | Railway bodies | |
| #7 | Pipes |
| # | Name | Total Patents |
|---|---|---|
| #1 | Schafer Robert | 2 |
| #2 | Robert Schaefer | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB497417A | Improvements in and relating to passenger transport vehicles | |
| GB156717A | Improvements in adjustable spanners | |
| GB173160A | An improved means for operating the jaws of spanners, vices or the like |