| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Austria | 9 | |
| #2 | Spain | 5 | |
| #3 | Canada | 4 | |
| #4 | United Kingdom | 2 | |
| #5 | United States | 2 |
| # | Industry | |
|---|---|---|
| #1 | Engines, pumps and turbines |
| # | Technology | |
|---|---|---|
| #1 | Siphons |
| # | Name | Total Patents |
|---|---|---|
| #1 | Metcalfe Richard David | 17 |
| #2 | Metcalfe James Croxon | 15 |
| #3 | Metcalfe James | 2 |
| Publication | Filing date | Title |
|---|---|---|
| ES121260A1 | Improvements in the steam injectors. | |
| ES117619A1 | Improvements in steam ejectors for vacuum brakes, railway wagons and similar vehicles. | |
| ES101645A1 | Improvements related to injectors. | |
| CA167625A | Injector | |
| US1076220A | Injector. | |
| CA112240A | Injector | |
| CA106097A | Injector | |
| GB190305139A | Improvements relating to Injectors. | |
| US714217A | Injector. | |
| GB190103469A | Improvements in or applicable to Injectors. | |
| CA274977A | Exhaust steam injector |