| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United Kingdom | 9 | |
| #2 | EPO (European Patent Office) | 4 | |
| #3 | Spain | 3 | |
| #4 | Sweden | 3 | |
| #5 | United States | 3 | |
| #6 | Australia | 2 | |
| #7 | Germany | 2 | |
| #8 | France | 2 | |
| #9 | Italy | 2 | |
| #10 | South Africa | 2 |
| # | Industry | |
|---|---|---|
| #1 | Chemical engineering | |
| #2 | Engines, pumps and turbines | |
| #3 | Machines | |
| #4 | Mechanical elements | |
| #5 | Environmental technology |
| # | Name | Total Patents |
|---|---|---|
| #1 | Gladstone Robert Steuart | 11 |
| #2 | Gladstone Robert Stueart | 5 |
| #3 | Gladstone Robert S | 3 |
| #4 | Gladstone R S | 3 |
| #5 | Gladstone Robert Stuart | 1 |
| #6 | Cameron David Charles | 1 |
| #7 | Gladstone Robert Stewart | 1 |
| #8 | Gladstone Robert | 1 |
| #9 | Steuart Gladstone Robert | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB9914692D0 | Improvements in and relating to air filters | |
| GB9401094D0 | Heavy duty air filter assembly | |
| GB8414030D0 | Air cleaner for i.c. engine | |
| GB8329726D0 | Air filter cleaning | |
| GB8324599D0 | Control of temperature of air supplied to i c engines | |
| GB8324598D0 | Controlling temperature of air supplied to i c engines | |
| GB2122105A | Water-gas separator | |
| GB2114711A | Gravity dump valve |