| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 12 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Machines | |
| #3 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Pipes | |
| #2 | Unspecified technologies | |
| #3 | Venting or aerating devices | |
| #4 | Earth drilling | |
| #5 | Pistons and sealings | |
| #6 | Belts or cables for driving | |
| #7 | Sewers | |
| #8 | Domestic plumbing installations | |
| #9 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Carlson Frank W | 12 |
| Publication | Filing date | Title |
|---|---|---|
| US1811611A | Floor drain | |
| US1681394A | Floor-drain valve | |
| US1566816A | Stuffing box | |
| US1417660A | Plumbing system | |
| US1391168A | Device for fastening belts | |
| US1044347A | Closet connection. | |
| US986905A | Closet bend or connection. | |
| US962621A | Closet connection. | |
| US942541A | Sillcock and other valve. | |
| US766754A | Pipe coupling or connection. | |
| US764347A | Pipe coupling or connection. | |
| US706298A | Sewer-pipe connection. |