| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United Kingdom | 80 | |
| #2 | Germany | 31 | |
| #3 | France | 24 | |
| #4 | United States | 19 | |
| #5 | Canada | 9 | |
| #6 | Italy | 9 | |
| #7 | Switzerland | 7 | |
| #8 | Spain | 6 | |
| #9 | Japan | 5 | |
| #10 | EPO (European Patent Office) | 2 | |
| #11 | India | 2 | |
| #12 | Republic of Korea | 2 | |
| #13 | Austria | 1 | |
| #14 | Australia | 1 | |
| #15 | Brazil | 1 | |
| #16 | German Democratic Republic | 1 | |
| #17 | Denmark | 1 | |
| #18 | South Africa | 1 |
| # | Industry | |
|---|---|---|
| #1 | Engines, pumps and turbines | |
| #2 | Mechanical elements | |
| #3 | Materials and metallurgy | |
| #4 | Machine tools | |
| #5 | Machines | |
| #6 | Surface technology and coating | |
| #7 | Environmental technology |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hill Harold Taylor | 22 |
| #2 | Howlett John William | 15 |
| #3 | Woolcott Arthur John | 13 |
| #4 | Fletcher-Jones David Francis | 10 |
| #5 | Taylor Hill Harold | 10 |
| #6 | Longfoot Gerald | 8 |
| #7 | Hill Harold T | 7 |
| #8 | Blacklock Kenneth Arthur | 6 |
| #9 | Harold Taylor Hill | 6 |
| #10 | Howlett John W | 5 |
| Publication | Filing date | Title |
|---|---|---|
| GB8919466D0 | Pistons | |
| GB8903129D0 | Piston rings | |
| GB8824222D0 | Pistons | |
| GB8804533D0 | Pistons | |
| GB1600325A | Pistons | |
| GB1598585A | Pistons | |
| GB1568272A | Pistons | |
| GB1592182A | Pistons | |
| GB1540136A | Method of bonding cast iron parts together | |
| GB1527791A | Pistons | |
| GB1542230A | Pistons | |
| GB1540388A | Pistons | |
| GB1502790A | Pistons | |
| GB1545509A | Sealing means | |
| GB1542903A | Sealing ring assemblies for pistons | |
| GB1527418A | Pistons | |
| GB1509461A | Pistons | |
| GB1467644A | Pistons | |
| ES424442A1 | Improvements introduced in piston segments. (Machine-translation by Google Translate, not legally binding) | |
| US3914574A | Fabricated piston with sprayed groove |