| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 9 | |
| #2 | Canada | 2 |
| # | Industry | |
|---|---|---|
| #1 | Machines | |
| #2 | Materials and metallurgy | |
| #3 | Textiles and paper | |
| #4 | Thermal processes | |
| #5 | Mechanical elements | |
| #6 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Unspecified technologies | |
| #2 | Shaping clay | |
| #3 | Building materials | |
| #4 | Unspecified technologies | |
| #5 | Typewriters | |
| #6 | Pipes | |
| #7 | General building constructions | |
| #8 | Burners |
| # | Name | Total Patents |
|---|---|---|
| #1 | Norton Charles L | 11 |
| Publication | Filing date | Title |
|---|---|---|
| US4690074A | Coal combustion system | |
| US2110470A | Insulating material | |
| US1998555A | Typewriter | |
| US1871730A | Structural material | |
| US1891479A | Coloration of concrete articles | |
| US1891269A | Concrete | |
| US1667434A | Method and apparatus for making building units | |
| US1572674A | Sanding apparatus for molding machines | |
| US1332677A | Apparatus for molding bodies of granular or comminuted material | |
| CA171344A | Concrete production | |
| CA356389A | Typewriter |