| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 5 | |
| #2 | France | 3 | |
| #3 | United Kingdom | 3 | |
| #4 | Germany | 1 |
| # | Industry | |
|---|---|---|
| #1 | Consumer goods | |
| #2 | Basic materials chemistry | |
| #3 | Materials and metallurgy | |
| #4 | Transport |
| # | Technology | |
|---|---|---|
| #1 | Writing or drawing tools | |
| #2 | Coating compositions | |
| #3 | Motor vehicles | |
| #4 | Building materials |
| # | Name | Total Patents |
|---|---|---|
| #1 | Ferst Monie A | 4 |
| #2 | Wysong Charles F | 2 |
| #3 | Harry Vaughan William | 1 |
| #4 | Edward Moodie T | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB575867A | Improvements in coloured marking leads or elements | |
| GB575868A | Improvements in pencil leads and the like graphite marking elements | |
| US2355639A | Pencil lead | |
| US2355638A | Color marking element | |
| US2348315A | Pencil lead, crayon, and ceramic | |
| US2131657A | Lead pencil, lead therefor, and process of making the same | |
| US2144889A | Vehicle supporting structure |