| # | Country | Total Patents | |
|---|---|---|---|
| #1 | France | 5 | |
| #2 | United States | 5 | |
| #3 | Germany | 3 | |
| #4 | United Kingdom | 2 | |
| #5 | Austria | 1 |
| # | Industry | |
|---|---|---|
| #1 | Materials and metallurgy | |
| #2 | Machines | |
| #3 | Machine tools | |
| #4 | Engines, pumps and turbines | |
| #5 | Surface technology and coating | |
| #6 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Metal tempering | |
| #2 | Unspecified technologies | |
| #3 | Alloys | |
| #4 | Cyclically operating valves | |
| #5 | Metal-working | |
| #6 | Unspecified technologies | |
| #7 | Coating metallic material | |
| #8 | Casting metal | |
| #9 | Making metal sheets | |
| #10 | Pistons and sealings |
| # | Name | Total Patents |
|---|---|---|
| #1 | Gerhard Kubera | 3 |
| #2 | Rolf Milbach | 2 |
| #3 | Guenzl Josef | 1 |
| #4 | Bockris Robert | 1 |
| #5 | Gisela Prasse | 1 |
| #6 | Winfried Steinheider | 1 |
| #7 | Merkt Harry | 1 |
| #8 | Kubera Gerhard | 1 |
| #9 | Grunert Gisela Prasse Geb | 1 |
| #10 | Harry Merkt | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB1130500A | Improvements in or relating to the casting of metals | |
| DE1213457B | Heat treatment process for the production of welded, sodium-filled valve cones | |
| US3358350A | Method of making a valve member for internal combustion engines | |
| DE1220877B | Process for the final shaping of preformed steel piston rings | |
| DE1228067B | Use of a steel alloy as a material for piston rings |