| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 6 | |
| #2 | United Kingdom | 3 | |
| #3 | United States | 2 |
| # | Industry | |
|---|---|---|
| #1 | Machines | |
| #2 | Furniture and games |
| # | Technology | |
|---|---|---|
| #1 | Preparing clay | |
| #2 | Kitchen equipment | |
| #3 | Games |
| # | Name | Total Patents |
|---|---|---|
| #1 | Karl Piehler | 2 |
| Publication | Filing date | Title |
|---|---|---|
| US1842879A | Concrete mixing machine | |
| GB332432A | Improvements in concrete mixing machines | |
| GB267484A | Process for mixing concrete | |
| US1743002A | Apparatus for making concrete | |
| GB226447A | Concrete mixer |