| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Engines, pumps and turbines | |
| #3 | Packaging and shipping | |
| #4 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Fire-fighting | |
| #2 | Ladders | |
| #3 | Controlling combustion engines | |
| #4 | Non-positive-displacement pumps | |
| #5 | Cranes | |
| #6 | Pistons and sealings |
| # | Name | Total Patents |
|---|---|---|
| #1 | Schellerer Josef | 8 |
| #2 | Siefermann Karl W | 2 |
| #3 | Fortmann Johs | 1 |
| #4 | Bachert Dipl-Ing Alfred | 1 |
| #5 | Hoell Ludwig | 1 |
| #6 | Bachert Dipl-Ing Karl | 1 |
| #7 | Siefermann Willi | 1 |
| Publication | Filing date | Title |
|---|---|---|
| CA903110A | Mobile swivel ladder | |
| CA911901A | Mobile swivel ladder |