Trademarks = 1

Forward Citations = 99

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3 inventors (with patents filed for the assignee):

Hans Bieri (10 out of 15 patents)

Bruno Granella (1 out of 1 patent)

Hans Bieri Jun (1 out of 1 patent)

12 patents: Sort by Forward Citations

1. 5653509 - Blockage-protected drive system with a centrifugal clutch, and sawing (1997-08-05),

2. 5645040 - Cable saw machine for cutting concrete bodies, rocks or the like (1997-07-08),

3. 5515886 - Method and apparatus for repairing a junction pipe connection to a main (1996-05-14),

4. 5201638 - Hydraulic energy supply cart (1993-04-13),

5. 5186157 - Guide and support structure for surface cutting apparatus (1993-02-16),

6. 5180209 - Apparatus for cutting recessed grooves into concrete and rock material (1993-01-19),

7. 4964434 - Dual control valve suitable for high pressure fluids (1990-10-23),

8. 4932597 - Concrete plate, panel, wall or flooring demolition apparatus (1990-06-12),

9. 4923344 - Coupling system for boring tools (1990-05-08),

10. 4572580 - Mobile concrete or rock cutting apparatus (1986-02-25),

11. 4557245 - Concrete cutting or milling apparatus including a guide rail (1985-12-10),

12. 4055353 - Clamping device, especially for rock or concrete drills (1977-10-25),

Company Overview

Hydrostress Ag, based in Pfaffikon, Switzerland, specializes in advanced stress analysis and material testing technologies. The company focuses on developing innovative solutions for the assessment and enhancement of material properties, particularly in the fields of construction and engineering. With a commitment to precision and reliability, Hydrostress Ag serves a diverse range of industries, providing tools and expertise that support the integrity and performance of structural components. Their research emphasizes the intersection of technology and material science.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 6 2026

12 Patents

#3 in Pfaffikon

#928 in Switzerland

#48,129 in the World

Pfaffikon, Switzerland

Hydrostress Ag

Forward Citations = 99

3 inventors:

Hans Bieri (10 out of 15 patents)

Bruno Granella (1 out of 1 patent)

Hans Bieri Jun (1 out of 1 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Hydrostress Ag. Retrieved from https://idiyas.com/company/hydrostress-ag

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]