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Trademarks = 1

Forward Citations = 96

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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),

Hydrostress AG is a leading manufacturer of high-quality hydraulic tools for demolition, concrete cutting, and repair. With over 40 years of experience, Hydrostress offers innovative solutions for the construction industry worldwide. Their products are known for their reliability, durability, and efficiency.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Dec 16 2025

12 Patents

#3 in Pfaffikon

#901 in Switzerland

#46,685 in the World

Pfaffikon, Switzerland

Hydrostress Ag

Forward Citations = 96

3 inventors:

Hans Bieri (10 out of 15 patents)

Bruno Granella (1 out of 1 patent)

Hans Bieri Jun (1 out of 1 patent)

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