| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 13 |
| # | Industry | |
|---|---|---|
| #1 | Electrical machinery and energy | |
| #2 | Furniture and games | |
| #3 | Civil engineering | |
| #4 | Control | |
| #5 | Machine tools | |
| #6 | Engines, pumps and turbines | |
| #7 | Mechanical elements | |
| #8 | Consumer goods |
| # | Technology | |
|---|---|---|
| #1 | Scaffolding | |
| #2 | Chairs and beds | |
| #3 | Dynamo-electric machines | |
| #4 | Brushes | |
| #5 | Furniture for children | |
| #6 | Gearing | |
| #7 | Time tables | |
| #8 | Tools for connecting or disengaging | |
| #9 | Internal-combustion piston engines | |
| #10 | Lighting device details |
| # | Name | Total Patents |
|---|---|---|
| #1 | Mraz Hans | 12 |
| #2 | Pelka Heinz | 1 |
| #3 | Mraz Irmgard | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE3429866A1 | Extraction device for cartridges and other inserts | |
| DE3306446A1 | Contact-free transmission | |
| DE3302504A1 | Magnetic-force motor | |
| DE3203192A1 | Magnetic-force motor | |
| DE1601824A1 | Single-stage single-stroke engine with rotary piston |