| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 7 | |
| #2 | Brazil | 1 | |
| #3 | Switzerland | 1 | |
| #4 | France | 1 | |
| #5 | United Kingdom | 1 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Furniture and games | |
| #3 | Measurement | |
| #4 | Control | |
| #5 | Packaging and shipping | |
| #6 | Textiles and paper | |
| #7 | Consumer goods | |
| #8 | Civil engineering | |
| #9 | Agriculture |
| # | Technology | |
|---|---|---|
| #1 | Clutches and brakes | |
| #2 | Alarm systems | |
| #3 | Containers for goods storage | |
| #4 | Animal shoeing | |
| #5 | Measuring temperature | |
| #6 | Hydraulic engineering | |
| #7 | Toys | |
| #8 | Kitchen equipment | |
| #9 | Brushes | |
| #10 | Textile material production |
| # | Name | Total Patents |
|---|---|---|
| #1 | Keller Karl | 3 |
| #2 | Karl Keller | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE631696C | Heat level indicator for cooking vessels | |
| GB352858A | Improvements in or relating to change speed gears particularly for motor driven vehicles |