| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 15 | |
| #2 | Austria | 2 | |
| #3 | United Kingdom | 1 | |
| #4 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Engines, pumps and turbines | |
| #3 | Machine tools | |
| #4 | Thermal processes | |
| #5 | Transport |
| # | Technology | |
|---|---|---|
| #1 | Nails | |
| #2 | Shafts | |
| #3 | Clutches and brakes | |
| #4 | Internal-combustion piston engines | |
| #5 | Supplying fuel to combustion device | |
| #6 | Parachutes | |
| #7 | Pipes | |
| #8 | Belts or cables for driving | |
| #9 | Controlling combustion engines | |
| #10 | Sawing |
| # | Name | Total Patents |
|---|---|---|
| #1 | Engelmann Walter | 13 |
| #2 | Walter Engelmann | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US3115805A | Spring retainer clip for grooved pin | |
| GB891129A | Improvements in or relating to devices for connecting rods to levers | |
| DE917803C | Solid fuel incinerator |