| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 10 | |
| #2 | Austria | 1 | |
| #3 | Canada | 1 | |
| #4 | Germany | 1 | |
| #5 | France | 1 | |
| #6 | United Kingdom | 1 |
| # | Industry | |
|---|---|---|
| #1 | Basic materials chemistry | |
| #2 | Thermal processes | |
| #3 | Machines | |
| #4 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Producer gas production | |
| #2 | Grates | |
| #3 | Fluid fuel combustion | |
| #4 | Unspecified technologies | |
| #5 | Locks |
| # | Name | Total Patents |
|---|---|---|
| #1 | Chapman William B | 10 |
| #2 | David Mason | 1 |
| #3 | Chapman William Brewster | 1 |
| #4 | Andrews Charles W | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US1777138A | Agitator and grate for fire beds | |
| US1709334A | Gas generator | |
| US1586176A | Fuel-feeding mechanism for gas producers | |
| US1528911A | Ash-ejecting apparatus for gas producers | |
| US1661408A | Method of burning powdered coal | |
| GB125932A | Improvements in and relating to Gas Producers. | |
| US1412921A | Gas producer | |
| US1341044A | Gas-producer | |
| US1361137A | Process of making or treating producer-gas | |
| US1162452A | Gas-producer. | |
| US1142144A | Gas-producer. | |
| CA199058A | Gas producer |