| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 8 | |
| #2 | Canada | 3 | |
| #3 | France | 1 | |
| #4 | United Kingdom | 1 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Pistons and sealings | |
| #2 | Shafts | |
| #3 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Johnson Lloyd A | 4 |
| #2 | Donham Owen Allison | 3 |
| #3 | Helfrecht Fred A | 2 |
| #4 | Johnson Lloyd Augustus | 2 |
| #5 | Mosher Ezra D | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2200925A | Fluid seal | |
| US2172280A | Fluid seal | |
| US2195708A | Fluid seal | |
| US2123079A | Fluid seal | |
| US2202206A | Fluid seal | |
| US2162104A | Fluid seal | |
| US2146677A | Fluid seal | |
| US2249141A | Fluid seal | |
| GB430846A | Fluid seal | |
| CA352215A | Fluid seal | |
| CA393384A | Oil seal | |
| CA367210A | Oil retainer |