| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 8 | |
| #2 | Germany | 2 | |
| #3 | United Kingdom | 2 |
| # | Industry | |
|---|---|---|
| #1 | Textiles and paper | |
| #2 | Consumer goods |
| # | Technology | |
|---|---|---|
| #1 | Copy machines | |
| #2 | Typewriters | |
| #3 | Filing and indexing |
| # | Name | Total Patents |
|---|---|---|
| #1 | Edward Hano | 8 |
| #2 | Lacroix George U | 1 |
| #3 | George Hogan | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2220842A | Continuous sheet duplicate form | |
| US2136817A | Transfer sheet holder | |
| US2120438A | Counter sales book | |
| US2087144A | Continuous duplicate form sheet | |
| GB443280A | Improvements in counter sale books | |
| GB438335A | Improvements in counter sales book | |
| US2001960A | Transfer sheet | |
| US2014020A | Counter sales book | |
| US2004942A | Counter sales book | |
| US1920640A | Carbon copying system |