| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 4 | |
| #2 | Denmark | 3 | |
| #3 | France | 2 | |
| #4 | United Kingdom | 2 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Packaging and shipping |
| # | Technology | |
|---|---|---|
| #1 | Ladders | |
| #2 | Lifting and pushing |
| # | Name | Total Patents |
|---|---|---|
| #1 | Geesink Mijndert | 3 |
| #2 | Royen Wouter Van | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE803251C | Lock mechanism for a lifting device working with a pressure medium | |
| DE815746C | Extendable ladder made of metal | |
| DE894353C | Gear box for turntable ladders | |
| DE803618C | Car provided with a liftable platform for assembly purposes | |
| GB643010A | Ladder control device | |
| GB635225A | Improvements in or relating to extensible ladders |