| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 26 |
| # | Industry | |
|---|---|---|
| #1 | Basic materials chemistry | |
| #2 | Civil engineering | |
| #3 | Machines | |
| #4 | Mechanical elements | |
| #5 | Electrical machinery and energy | |
| #6 | Chemical engineering | |
| #7 | Thermal processes | |
| #8 | Environmental technology |
| # | Technology | |
|---|---|---|
| #1 | Smoke generating devices | |
| #2 | Earth drilling | |
| #3 | Unspecified technologies | |
| #4 | Pipes | |
| #5 | Separation | |
| #6 | Electric switches | |
| #7 | Heat-exchange device details | |
| #8 | Combustion residues removal | |
| #9 | Steam condensers | |
| #10 | Venting or aerating devices |
| # | Name | Total Patents |
|---|---|---|
| #1 | Weisgerber Edwin C | 26 |
| Publication | Filing date | Title |
|---|---|---|
| US2277670A | Spark arrester | |
| US2315681A | Filter | |
| US1819273A | Expansible fish tail bit | |
| US1637628A | Tool joint | |
| US1720067A | Battery clip | |
| US1717640A | Pivotal joint for pipe | |
| US1581371A | Gas and oil separator | |
| US1603654A | Valve | |
| US1588071A | Run-down box | |
| US1596383A | Heat exchanger | |
| US1499710A | Gas and oil separator | |
| US1612557A | Oil and water separator | |
| US1605312A | Condenser | |
| US1346574A | Fuse-plug | |
| US1339143A | Colored smoke | |
| US1339144A | Colored smoke | |
| US1339142A | Colored smoke | |
| US1339146A | Colored smoke | |
| US1339145A | Colored smoke | |
| US1339149A | Colored smoke |