| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 10 | |
| #2 | United Kingdom | 4 | |
| #3 | United States | 2 |
| # | Industry | |
|---|---|---|
| #1 | Machine tools | |
| #2 | Civil engineering | |
| #3 | Machines | |
| #4 | Materials and metallurgy | |
| #5 | Furniture and games | |
| #6 | Electrical machinery and energy | |
| #7 | Consumer goods |
| # | Technology | |
|---|---|---|
| #1 | General building constructions | |
| #2 | Punching metal | |
| #3 | Structural elements | |
| #4 | Unspecified technologies | |
| #5 | Metal tempering | |
| #6 | Rolling metal | |
| #7 | Physical training equipment | |
| #8 | Dynamo-electric machines | |
| #9 | Veneer production | |
| #10 | Harnesses |
| # | Name | Total Patents |
|---|---|---|
| #1 | Ernst Hoffmann | 2 |
| Publication | Filing date | Title |
|---|---|---|
| GB637204A | Improvements relating to concrete construction | |
| GB509378A | Improvements in reinforcing inserts for concrete structures and in processes for producing them | |
| GB347061A | Improvements relating to concrete floors | |
| DE483868C | Rotary chute drive | |
| GB261739A | Improvements in and relating to reinforcing irons for reinforced concrete structures | |
| US1692505A | Reenforcement bar for concrete steel and method of manufacturing the same |