Company Filing History:

4 out of 41

The Robbins Company

patents

1 out of 832,718

Other

patents

Years Active: 1983-1999

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5 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 5890771 - Tunnel boring machine and method (1999-04-06),

2. 5203614 - Tunneling machine having liquid balance low flow slurry system (1993-04-20),

3. 5127711 - Hopper and hood combination for tunneling machine and tunneling machine (1992-07-07),

4. 4646853 - Shaft boring machine and method (1987-03-03),

5. 4420188 - Double shield tunnel boring machine (1983-12-13),

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Company Filing History:

Years Active: 1983-1999