| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 64 | |
| #2 | Canada | 4 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Machines | |
| #3 | Machine tools | |
| #4 | Chemical engineering |
| # | Technology | |
|---|---|---|
| #1 | Lubricating | |
| #2 | Unspecified technologies | |
| #3 | Venting or aerating devices | |
| #4 | Metal-working | |
| #5 | Separation | |
| #6 | Punching metal |
| # | Name | Total Patents |
|---|---|---|
| #1 | Davis Ernest W | 12 |
| #2 | Ulysses Zerk Oscar | 10 |
| #3 | Zerk Oscar U | 7 |
| #4 | Murphy Howard J | 6 |
| #5 | Pierce Earl F | 3 |
| #6 | Fesler Douglas F | 3 |
| #7 | Emile Piquerez | 3 |
| #8 | Roberts Henry T | 3 |
| #9 | Brand Harold H | 2 |
| #10 | Foyle Robert W | 2 |
| Publication | Filing date | Title |
|---|---|---|
| US1717167A | Lubricating apparatus | |
| US1697324A | Lubricating apparatus | |
| US1716500A | Method of making lubricant nipples | |
| US1707977A | Nipple | |
| US1720885A | Booster and release valve | |
| US1697218A | Nipple | |
| US1707425A | Art of dispensing grease | |
| US1710959A | Lubricant reservoir and dash pump | |
| US1714465A | Lubricating apparatus | |
| US1716487A | Lubricating apparatus | |
| US1716483A | Lubricating apparatus | |
| US1720380A | Liquid-handling device | |
| US1718575A | Lubricating apparatus | |
| US1714260A | Lubricant compressor | |
| US1716504A | Lubricant compressor | |
| US1716493A | Lubricating apparatus | |
| US1716501A | Lubricating apparatus | |
| US1707993A | Automatic charge-limiting device for lubrication | |
| US1711905A | Lubricant compressor | |
| US1694624A | Lubricant compressor |