| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Australia | 3 | |
| #2 | United States | 3 | |
| #3 | Canada | 2 | |
| #4 | United Kingdom | 2 | |
| #5 | Germany | 1 | |
| #6 | New Zealand | 1 | |
| #7 | Sweden | 1 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Engines, pumps and turbines | |
| #3 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Pistons and sealings | |
| #2 | Pumps | |
| #3 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Urquhart William James | 5 |
| #2 | Urquhart William J | 3 |
| #3 | Urquhart W J | 2 |
| #4 | Urguhart W J | 1 |
| Publication | Filing date | Title |
|---|---|---|
| AU3498978A | Piston rod seal | |
| US4135723A | Piston rod seal | |
| CA1044570A | Liquid operated double acting device | |
| DE2556465A1 | Reciprocating piston for pumps and engines - has crossed helical and circumferential grooves on curved surface holding oil for sealing | |
| NZ179474A | Piston:sealand intersecting helical grooves | |
| CA1032034A | Pistons | |
| AU8731575A | Liquid operated double acting device | |
| AU8652675A | Piston |