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Forward Citations = 29

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6 inventors (with patents filed for the assignee):

Frithjof Schimpff (6 out of 6 patents)

Rolf Knodel (1 out of 1 patent)

Thomas Zander (1 out of 1 patent)

4. Wolfgang Bergenthal (1 out of 1 patent)

5. Frithiof Schimpff (1 out of 1 patent)

6. Volker Otto Meldner (1 out of 1 patent)

8 patents: Sort by Forward Citations

1. 5301927 - Method of making concrete switch cross ties (1994-04-12),

2. 5227112 - Method of making concrete switch cross ties (1993-07-13),

3. 5200210 - Assembly for fastening components for producing concrete bodies (1993-04-06),

4. 5196209 - Making a prestressed concrete beam (1993-03-23),

5. 5127160 - Method of fastening construction components in a casing for (1992-07-07),

6. 5124093 - Process for the production of concrete switch cross ties (1992-06-23),

7. 4948089 - Concrete mold with arrangement for mounting tubular components (1990-08-14),

8. 4075855 - Tunnel construction and tunnel tubbing (1978-02-28),

Wayss & Freytag Aktiengesellschaft is a German construction company specializing in infrastructure, building and civil engineering projects. With over 125 years of experience, they are known for their expertise in complex construction projects, sustainable solutions, and innovative technologies. The company is committed to delivering high-quality and reliable services to their clients, ensuring that every project is completed to the highest standards.

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USPTO Data Jan 1 1976 - Dec 16 2025

8 Patents

#65 in Frankfurt am Main

#4,358 in Germany

Frankfurt am Main, Germany

Wayss & Freytag Aktiengesellschaft