| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Netherlands | 3 | |
| #2 | China | 2 | |
| #3 | Norway | 2 | |
| #4 | Canada | 1 | |
| #5 | EPO (European Patent Office) | 1 | |
| #6 | Finland | 1 | |
| #7 | Japan | 1 | |
| #8 | Republic of Korea | 1 | |
| #9 | Poland | 1 | |
| #10 | Russian Federation | 1 | |
| #11 | United States | 1 | |
| #12 | WIPO (World Intellectual Property Organization) | 1 |
| # | Industry | |
|---|---|---|
| #1 | Measurement | |
| #2 | Engines, pumps and turbines |
| # | Technology | |
|---|---|---|
| #1 | Analysing materials | |
| #2 | Rotary-pistons | |
| #3 | Measuring volume | |
| #4 | Rotary pistons |
| # | Name | Total Patents |
|---|---|---|
| #1 | Blom Cornelis | 9 |
| #2 | Van Der Werf Kornelis Oebele | 4 |
| #3 | Werf Kornelis Oebele Van Der | 2 |
| #4 | Van Der Verf Kornelis Ubele | 1 |
| #5 | Pitt Gillies David | 1 |
| #6 | Blom C | 1 |
| #7 | Blom Kornelis | 1 |
| #8 | Korunerisu Buromu | 1 |
| #9 | Jong Job De | 1 |
| #10 | Snel Dirk Hendrik Petrus | 1 |
| Publication | Filing date | Title |
|---|---|---|
| NL1010308C2 | Piezoelectric viscometer. | |
| NL9400723A | Viscosity Meter. | |
| NL9101288A | Viscosity meter. |