| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 5 | |
| #2 | Canada | 2 | |
| #3 | Germany | 2 | |
| #4 | France | 2 | |
| #5 | United Kingdom | 2 | |
| #6 | Australia | 1 | |
| #7 | Mexico | 1 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Machines | |
| #3 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Pistons and sealings | |
| #2 | Unspecified technologies | |
| #3 | Earth drilling | |
| #4 | Pipes | |
| #5 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hertz Daniel L Jr | 5 |
| #2 | Hertz Jr Daniel L | 4 |
| #3 | Hertz Daniel L | 2 |
| #4 | Hertz Jun Daniel L | 1 |
| #5 | Farinella Andrew | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US6361052B1 | Seal for preventing leakage of fluids between irregular areas on mating surfaces | |
| US4720113A | Multilayer, multihardness seal | |
| US4524982A | Seal for aggressive environments | |
| US4270761A | Seal for geothermal wells and the like | |
| DE2931603A1 | Multilayer seal for hydraulic piston - consists of stack of alternating elastomeric and metal rings with graduated thicknesses | |
| CA1114419A | Multilayer seal | |
| GB2055993A | Multilayer seal | |
| US4185840A | Multilayer seal |