| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Denmark | 2 | |
| #2 | EPO (European Patent Office) | 2 | |
| #3 | Netherlands | 2 | |
| #4 | Australia | 1 | |
| #5 | Canada | 1 | |
| #6 | Norway | 1 | |
| #7 | New Zealand | 1 | |
| #8 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Measurement | |
| #2 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Measuring volume | |
| #2 | Venting or aerating devices |
| # | Name | Total Patents |
|---|---|---|
| #1 | Kramer Albert | 7 |
| #2 | Kramer A | 2 |
| Publication | Filing date | Title |
|---|---|---|
| US4918994A | Gas meter | |
| NL8802878A | Gas meter. | |
| DK245187D0 | Procedure for measuring gas quantities that flow through an input opening | |
| NL8503192A | Gas meter. |