% Expired Patents = 9.1

EPO Patents = 6

Forward Citations = 56

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8 inventors (with patents filed for the assignee):

Bin Sai (9 out of 31 patents)

Fernand Wicht (2 out of 2 patents)

Ronald Schrier (1 out of 5 patents)

4. Ronald C Sehrier (1 out of 1 patent)

5. Dale Hicks (1 out of 1 patent)

6. John H Matthews (1 out of 1 patent)

7. Adrianus Leonardus David Van Schie (1 out of 1 patent)

8. Jan Leendert Stolk (1 out of 1 patent)

9. Ferencz Nandor Toth (1 patent)

11 patents: Sort by Forward Citations

1. 8659472 - Method and apparatus for highly accurate higher frequency signal generation and related level gauge (2014-02-25),

2. 8631696 - Apparatus and method for monitoring tanks in an inventory management system (2014-01-21),

3. 8319680 - Radar liquid level detection using stepped frequency pulses (2012-11-27),

4. 8315825 - Method and apparatus for adaptively handling level measurements under unstable conditions (2012-11-20),

5. 8271212 - Method for robust gauging accuracy for level gauges under mismatch and large opening effects in stillpipes and related apparatus (2012-09-18),

6. 8251081 - Device for metering fluids (2012-08-28),

7. 8234084 - Apparatus and method for automatic gauge reading in an inventory control and management system (2012-07-31),

8. 8224594 - Apparatus and method for dynamic peak detection, identification, and tracking in level gauging applications (2012-07-17),

9. 8186214 - Method and device for determining the level L of a liquid within a specified measuring range by means of radar signals transmitted to the liquid surface and radar signals reflected from the liquid surface (2012-05-29),

10. 8159358 - Apparatus and method for storage tank hatch monitoring in an inventory management system (2012-04-17),

11. 7891229 - Method and apparatus for real-time calibration of a liquid storage tank level gauge (2011-02-22),

Company Overview

Enraf B.V., based in Delft, Netherlands, specializes in advanced measurement and control solutions primarily for the oil and gas industry. The company develops innovative technologies that enhance the accuracy and efficiency of tank gauging and inventory management systems. Enraf's expertise extends to various sectors, including chemical and pharmaceutical industries, where precise measurement is critical. With a commitment to research and development, Enraf continues to advance its product offerings to meet the evolving needs of its global clientele.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

11 Patents

#9 in Delft

#569 in Netherlands

#51,761 in the World

Delft, Netherlands

Enraf B.v.

Forward Citations = 56

8 inventors:

Bin Sai (9 out of 31 patents)

Fernand Wicht (2 out of 2 patents)

Ronald Schrier (1 out of 5 patents)

4. Ronald C Sehrier (1 out of 1 patent)

5. Dale Hicks (1 out of 1 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Enraf B.v.. Retrieved from https://idiyas.com/company/enraf-b-v

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]

6 patents (EPO):

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]