| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 19 | |
| #2 | United States | 4 | |
| #3 | France | 2 | |
| #4 | United Kingdom | 1 |
| # | Industry | |
|---|---|---|
| #1 | Control | |
| #2 | Textiles and paper | |
| #3 | Foods and drinks | |
| #4 | Mechanical elements | |
| #5 | Consumer goods |
| # | Technology | |
|---|---|---|
| #1 | Coin-freed | |
| #2 | Stamps | |
| #3 | Systems controlling non-electric variables | |
| #4 | Venting or aerating devices | |
| #5 | Printing machines | |
| #6 | Dairy products | |
| #7 | Ticket-issuing devices | |
| #8 | Bookbinding |
| # | Name | Total Patents |
|---|---|---|
| #1 | Wilhelm Friedrichs | 4 |
| #2 | Friedrichs Wilhelm | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2142440A | Automatic cash registering device for coin-controlled franking apparatus | |
| US2101615A | Coin controlled prepaying machine for mail | |
| US1750399A | Franking machine | |
| US1789038A | Stamping, printing, and stamp-canceling device | |
| GB291650A | Improvements in apparatus for manually applying book covers | |
| FR453893A | Automatic shut-off valve for steam lines or other |