| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 22 | |
| #2 | United Kingdom | 4 | |
| #3 | Canada | 3 |
| # | Industry | |
|---|---|---|
| #1 | Textiles and paper | |
| #2 | Control | |
| #3 | Consumer goods |
| # | Technology | |
|---|---|---|
| #1 | Stamps | |
| #2 | Money sorting | |
| #3 | Books | |
| #4 | Printing machines |
| # | Name | Total Patents |
|---|---|---|
| #1 | Carlson John W | 7 |
| #2 | Ole Slettevold | 6 |
| #3 | Hedman Herbert R | 4 |
| #4 | Johnson Clarence W | 3 |
| #5 | Fesler Douglas F | 2 |
| #6 | Hedman Carl M | 2 |
| #7 | Martin Lippe | 2 |
| #8 | Edwin Dauer Louis | 1 |
| #9 | Shipman William Herbert N | 1 |
| #10 | Slettevold Ole | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2109104A | Check writer | |
| US2088789A | Check writer | |
| US2103098A | Check writer | |
| US2016345A | Differential stop mechanism for check writers | |
| US1995022A | Check writer | |
| US2075630A | Multiple check signer | |
| US1961716A | Check writer operating mechanism | |
| US1898030A | Check writer | |
| US1984706A | Signature writing machine | |
| GB297470A | Improvements in or relating to signature-impressing devices | |
| US1783219A | Check protector | |
| US1783182A | Check protector | |
| US1844203A | Check protector | |
| US1798455A | Check-writing machine | |
| US1943607A | Signature writing machine | |
| US1731783A | Coin-delivery chute | |
| US1721104A | Check certifier | |
| US1773348A | Change-making machine | |
| US1703106A | Check protector | |
| US1673366A | Change-making machine |