| # | Country | Total Patents | |
|---|---|---|---|
| #1 | France | 28 | |
| #2 | Canada | 3 | |
| #3 | United Kingdom | 3 |
| # | Industry | |
|---|---|---|
| #1 | Basic materials chemistry | |
| #2 | Mechanical elements | |
| #3 | Civil engineering | |
| #4 | Packaging and shipping | |
| #5 | Chemical engineering | |
| #6 | Machine tools |
| # | Technology | |
|---|---|---|
| #1 | Gas holders | |
| #2 | Gas, coke and tar production | |
| #3 | Swimming pools | |
| #4 | Purifying gas composition | |
| #5 | Containers for goods storage | |
| #6 | Hydraulic engineering | |
| #7 | Separation | |
| #8 | Soldering, welding and flame cutting | |
| #9 | Shafts | |
| #10 | Construction of bridges |
| # | Name | Total Patents |
|---|---|---|
| #1 | Schurmann Friedrich | 3 |
| #2 | Schade Helmut | 1 |
| #3 | Einbeck Friedrich | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB430466A | Improvements in or relating to waterless gas holders | |
| GB393887A | Improvements in or relating to waterless gas holders | |
| GB251222A | Improvements in waterless gas-holders or gasometers having vertically sliding closing discs or pistons | |
| CA273027A | Sealing-piston for reservoirs | |
| CA325167A | Gas holder piston | |
| CA280563A | Gas sealing piston |