| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Switzerland | 16 | |
| #2 | France | 3 | |
| #3 | Germany | 2 | |
| #4 | United Kingdom | 1 |
| # | Industry | |
|---|---|---|
| #1 | Measurement | |
| #2 | Electrical machinery and energy | |
| #3 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Measuring volume | |
| #2 | Measuring temperature | |
| #3 | Dynamo-electric machines | |
| #4 | Venting or aerating devices |
| # | Name | Total Patents |
|---|---|---|
| #1 | Charles Hummel | 4 |
| #2 | Wassermesserfabrik Ag Aquametr | 3 |
| #3 | Maximilian Vogelsanger | 3 |
| #4 | Wassermesserfabrik Aktiengesel | 3 |
| #5 | Hummel Charles | 2 |
| #6 | Walter Fluri | 1 |
| #7 | Karl Hummel | 1 |
| #8 | Paul Haeberli | 1 |
| #9 | Henri Gailloud | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE1127096B | Measuring device with rotating members separated by a partition and magnetically coupled | |
| DE1084929B | Liquid flow meter | |
| GB596054A | A calorie computing device for fluid heat carriers |