| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Netherlands | 10 | |
| #2 | Germany | 3 | |
| #3 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Bolts for doors or windows | |
| #2 | Doors and windows | |
| #3 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Herpen Frederik Cornelis Van | 3 |
| #2 | Van Herpen Frederik Cornelis | 1 |
| Publication | Filing date | Title |
|---|---|---|
| NL8002403A | Double-glaz-ng panel profiled support - has locking devices preventing relative sliding movement of portions in transverse direction | |
| NL8002106A | Double glazing profiled mounting section - has upright leg with edge bent outwards at acute angle | |
| NL7608393A | Swing door profiled section - is U=shaped with strips enclosing locking slide actuated by knob | |
| NL7505995A | Door or window closure. | |
| NL7410322A | Seal for two panel-shaped elements. | |
| NL7405631A | Window frame latch articulated arm - this is slewed and tilted when folded to lock window shut |