| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United Kingdom | 5 | |
| #2 | Germany | 3 | |
| #3 | France | 2 | |
| #4 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Machines | |
| #3 | Medical technology | |
| #4 | Transport | |
| #5 | Furniture and games |
| # | Technology | |
|---|---|---|
| #1 | Earth drilling | |
| #2 | Shafts | |
| #3 | Working stone | |
| #4 | Devices for public amusement | |
| #5 | Mining | |
| #6 | Electrotherapy | |
| #7 | Vehicle transmission mounting |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hammer Ludwig | 2 |
| #2 | Ludwig Hammer | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB457098A | Means for taking sun-baths | |
| US1920904A | Rock-boring machine | |
| GB379297A | Excavating machine | |
| GB380469A | Improvements relating to well-sinking | |
| GB380451A | Well-lining process and device | |
| GB366013A | Chisel machine |