| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 5 | |
| #2 | Austria | 2 | |
| #3 | Belgium | 1 | |
| #4 | Switzerland | 1 | |
| #5 | EPO (European Patent Office) | 1 | |
| #6 | France | 1 | |
| #7 | Japan | 1 | |
| #8 | Netherlands | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Machine tools | |
| #3 | Packaging and shipping |
| # | Technology | |
|---|---|---|
| #1 | Finishing work on buildings | |
| #2 | Accessories for machine tools | |
| #3 | Transport or storage devices | |
| #4 | Bolts for doors or windows |
| # | Name | Total Patents |
|---|---|---|
| #1 | Henke Wilhelm | 6 |
| #2 | Buiruherumu Henke | 1 |
| #3 | Wilhelm Henke | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE3023872A1 | Trap door locking mechanism - has pull rod operated swivel arm in lock housing with one end moving spring-loaded catch bolt | |
| DE2942102A1 | DRILLING MACHINE | |
| DE2830317A1 | Extensible attic staircase hinged ceiling panel - has heat insulating layer between flat outside load bearing layers | |
| FR2333106A1 | Spiral stair banister with balusters - has handrail profile web secured in baluster slots by screws through baluster and web | |
| DE1659995A1 | Fully automatic attic stairs | |
| DE1509491A1 | Attic stairs |