Wayss & Freytag Aktiengesellschaft

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Frankfurt am Main, DE

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Patents Grantslast 30 patents

Information Patent Grant
Method of making concrete switch cross ties
- Patent number 5,301,927
- Issue date Apr 12, 1994
- Wayss & Freytag Aktiengesellschaft
- Frithjof Schimpff
- B28 - WORKING CEMENT, CLAY, OR STONE
Information Patent Grant
Method of making concrete switch cross ties
- Patent number 5,227,112
- Issue date Jul 13, 1993
- Wayss & Freytag Aktiengesellschaft
- Frithjof Schimpff
- B28 - WORKING CEMENT, CLAY, OR STONE
Information Patent Grant
Assembly for fastening components for producing concrete bodies
- Patent number 5,200,210
- Issue date Apr 6, 1993
- Wayss & Freytag Aktiengesellschaft
- Frithiof Schimpff
- B28 - WORKING CEMENT, CLAY, OR STONE
Information Patent Grant
Making a prestressed concrete beam
- Patent number 5,196,209
- Issue date Mar 23, 1993
- Wayss & Freytag AG
- Frithjof Schimpff
- B28 - WORKING CEMENT, CLAY, OR STONE
Information Patent Grant
Method of fastening construction components in a casing for series-...
- Patent number 5,127,160
- Issue date Jul 7, 1992
- Wayss & Freytag Aktiengesellschaft
- Frithjof Schimpff
- B28 - WORKING CEMENT, CLAY, OR STONE
Information Patent Grant
Process for the production of concrete switch cross ties
- Patent number 5,124,093
- Issue date Jun 23, 1992
- Wayss & Freytag Aktiengesellschaft
- Frithjof Schimpff
- B28 - WORKING CEMENT, CLAY, OR STONE
Information Patent Grant
Concrete mold with arrangement for mounting tubular components
- Patent number 4,948,089
- Issue date Aug 14, 1990
- Wayss & Freytag Aktiengesellschaft
- Rolf Knodel
- B28 - WORKING CEMENT, CLAY, OR STONE
Information Patent Grant
Tunnel construction and tunnel tubbing
- Patent number 4,075,855
- Issue date Feb 28, 1978
- Wayss & Freytag Aktiengesellschaft
- Volker Otto Meldner
- E21 - EARTH DRILLING MINING

Wayss & Freytag Aktiengesellschaft

Organization

Patents Grantslast 30 patents

Method of making concrete switch cross ties

Method of making concrete switch cross ties

Assembly for fastening components for producing concrete bodies

Making a prestressed concrete beam

Method of fastening construction components in a casing for series-...

Process for the production of concrete switch cross ties

Concrete mold with arrangement for mounting tubular components

Tunnel construction and tunnel tubbing