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For the Inventor, By the Inventor

Ansbach, Germany

Hydrometer Gmbh


USPTO Granted Patents = 16

% Expired Patents = 56.3


Trademarks = 3

Forward Citations = 91

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27 inventors (with patents filed for the assignee):

goldMedal Harald Kroemer (5 out of 8 patents)

silverMedal Hans-Michael Sonnenberg (5 out of 13 patents)

bronzeMedal Wilhelm Oefelein (2 out of 4 patents)

4.  Axel Schmidt-Schoenian (2 out of 2 patents)

5.  Wilhelm Ofelein (2 out of 2 patents)

6.  Gunter Hauenstein (2 out of 2 patents)

7.  Ulrich Gaugler (1 out of 5 patents)

8.  Roland Messthaler (1 out of 2 patents)

9.  Christian Schirm (1 out of 1 patent)

10.  Robert Braun (1 out of 1 patent)

11.  Steffen Lacher (1 out of 1 patent)

12.  Ulrich Eff (1 out of 1 patent)

13.  Gerhard Dietz (1 out of 1 patent)

14.  Tino Hofmann (1 out of 1 patent)

15.  Roland Horn (1 out of 1 patent)


16 patents:

1. 9784604 - Method for determining at least one gas parameter of a flowing gas (2017-10-10),
2. 9719823 - Gas meter (2017-08-01),
3. 9032790 - Gas meter (2015-05-19),
4. 8904881 - Ultrasound transducer assembly and ultrasound flowmeter (2014-12-09),
5. 8516901 - Retrofit ultrasonic insertion type flow meter (2013-08-27),
6. 8499648 - Gas meter (2013-08-06),
7. 8443842 - Flow straightener for a flowmeter, in particular an ultrasonic metering device (2013-05-21),
8. 8424392 - Housing arrangement for ultrasound flow meter and ultrasound flow meter (2013-04-23),
9. 7819021 - Fluid meter (2010-10-26),
10. 7698958 - Differential pressure means for a gas meter arrangement, comprising an improved flow geometry (2010-04-20),
11. 7366057 - Converter control with LC filtering (2008-04-29),
12. 7360447 - Flow meter having a reflector with spherical-concave surface (2008-04-22),
13. 7287437 - Flow meter for fluid or gas-like media (2007-10-30),
14. 6848303 - Water meter with a measuring insert, sealed towards the outside (2005-02-01),
15. 5831158 - Combination water meter (1998-11-03),
Company Overview
Hydrometer GmbH, based in Ansbach, Germany, specializes in the development and manufacturing of precision measurement instruments and analytical solutions. The company focuses on providing advanced technologies for various industries, including food and beverage, pharmaceuticals, and environmental monitoring. With a commitment to innovation, Hydrometer GmbH enhances product quality and process efficiency through its sophisticated measurement devices and software solutions, catering to a global market with a strong emphasis on reliability and accuracy.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 6 2026

16 Patents

#3 in Ansbach

#2,621 in Germany

#37,788 in the World

Ansbach, DE
Ansbach, Germany

Hydrometer Gmbh

Forward Citations = 91

27 inventors:

goldMedal Harald Kroemer (5 out of 8 patents)

silverMedal Hans-Michael Sonnenberg (5 out of 13 patents)

bronzeMedal Wilhelm Oefelein (2 out of 4 patents)

4.  Axel Schmidt-Schoenian (2 out of 2 patents)

5.  Wilhelm Ofelein (2 out of 2 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Hydrometer Gmbh. Retrieved from https://idiyas.com/company/hydrometer

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]
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