Individual holder
WALBROEHL H T
5 granted patents·46 citations·filing 1978–1991
Individually held — no corporate assignee on record.
Technology mixE21D5
Top patents by PatentIndex Score
5 records- 0173US4437788AMethod and apparatus for the advancing of a sliding formWALBROEHL H T·Filed 1981·Granted Mar 20, 1984·20 cites·22 claims
- 0240US5253955AAutomatically advancing supporting and sliding form for introducing an in-situ concrete liningWALBROEHL H T·Filed 1991·Granted Oct 19, 1993·15 cites·17 claims
- 0330US4305684AMethod of and apparatus for horizontally and vertically guiding a cutter drive shieldWALBROEHL H T·Filed 1978·Granted Dec 15, 1981·2 cites·14 claims
- 0429US5269628ADevice for opening and supporting a headwayWALBROEHL H T·Filed 1990·Granted Dec 14, 1993·6 cites·10 claims
- 0526US4830535AKnife shield driving device and method for the excavating and/or final supporting of galleries or the likeWALBROEHL H T·Filed 1987·Granted May 16, 1989·3 cites·22 claims
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