| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Austria | 13 | |
| #2 | Switzerland | 12 | |
| #3 | Germany | 7 | |
| #4 | France | 5 | |
| #5 | United States | 2 | |
| #6 | Denmark | 1 | |
| #7 | United Kingdom | 1 |
| # | Industry | |
|---|---|---|
| #1 | Measurement | |
| #2 | Control | |
| #3 | Electrical machinery and energy | |
| #4 | Materials and metallurgy |
| # | Technology | |
|---|---|---|
| #1 | Measuring volume | |
| #2 | Coin-freed | |
| #3 | Systems controlling non-electric variables | |
| #4 | Magnets and transformers | |
| #5 | Alloys |
| # | Name | Total Patents |
|---|---|---|
| #1 | Elster Co Gasmesserfabrik Main | 12 |
| #2 | Georg Meyer | 2 |
| Publication | Filing date | Title |
|---|---|---|
| US1783742A | Valve mechanism for gas meters | |
| AT116836B | Control for dry gas meters. | |
| US1758083A | Gas meter | |
| GB191227201A | Pinion Gearing with Variable Transmission. |