| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 5 | |
| #2 | United Kingdom | 4 | |
| #3 | France | 3 | |
| #4 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Electrical machinery and energy | |
| #2 | Materials and metallurgy | |
| #3 | Chemical engineering | |
| #4 | Machine tools | |
| #5 | Mechanical elements | |
| #6 | Transport |
| # | Technology | |
|---|---|---|
| #1 | Electric incandescent lamps | |
| #2 | Changing non-ferrous metals | |
| #3 | Soldering, welding and flame cutting | |
| #4 | Alloys | |
| #5 | Vehicle parts | |
| #6 | Electric discharge tubes | |
| #7 | Incandescent mantles | |
| #8 | Shafts | |
| #9 | Separation | |
| #10 | Working metallic powder |
| # | Name | Total Patents |
|---|---|---|
| #1 | Fischer Carl Heinrich | 3 |
| #2 | Carl Heinrich Fischer | 2 |
| #3 | Sacek Johann | 1 |
| #4 | Rudolf Zimmermann | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB250896A | Improvements relating to vacuum apparatus such as electric incandescent lamps, thermionic valves, and so forth | |
| GB231292A | Improved manufacture of ductile metals from refractory metals | |
| US1213422A | Process of electrically welding tubes. | |
| GB191224875A | Improvements in Incandescing Bodies. | |
| GB191208720A | Process for Rendering Metals Ductile. |