| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 21 | |
| #2 | United Kingdom | 5 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Engines, pumps and turbines | |
| #3 | Mechanical elements | |
| #4 | Transport | |
| #5 | Furniture and games |
| # | Technology | |
|---|---|---|
| #1 | Earth drilling | |
| #2 | Mining | |
| #3 | Shafts | |
| #4 | Machines | |
| #5 | Railway equipment | |
| #6 | Pistons and sealings | |
| #7 | Office furniture |
| Publication | Filing date | Title |
|---|---|---|
| GB231942A | Improvements in or connected with coal cutting machines | |
| GB224967A | Improvements in or connected with apparatus for boring earth and rock for use in mines and the like | |
| GB221934A | Improvements in or relating to apparatus for overhead boring in mines and the like | |
| GB225268A | Improvements in and connected with apparatus for overhead boring in mines and the like | |
| GB220470A | Improvements in the construction of jars for use with earth and rock boring apparatus | |
| DE380313C | Device for high drilling |