| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Mechanical elements | |
| #3 | Furniture and games | |
| #4 | Optics |
| # | Technology | |
|---|---|---|
| #1 | Locks | |
| #2 | Nails | |
| #3 | Indexing scheme relating to hinges | |
| #4 | Office furniture | |
| #5 | Hinges for doors or windows | |
| #6 | Cameras |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hensel Erich | 22 |
| #2 | Erich Hensel | 6 |
| Publication | Filing date | Title |
|---|---|---|
| ES253997A1 | Improvements in the articulation mechanisms for bodies of applied and rotating shapes between (Machine-translation by Google Translate, not legally binding) | |
| CA549827A | Locks | |
| CA540120A | Mortise lock having wards |