IP Library › Granted Patent US 6,446,741
Granted Patent Utility
US 6,446,741 · App. 09/663,573

Rock drill

Inventors: Heinrich Kersten, Hartmut Precht
Patented Case View Patent ↗
Granted: Sep 10, 2002 Filed: Sep 15, 2000
Inventors
Heinrich Kersten
Hartmut Precht
Assignee (at issue)
Gebrueder Heller Dinklage GmbH

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Quick Facts
Patent No.
US 6,446,741
App. No.
09/663,573
Filed
2000-09-15
Granted
2002-09-10
Kind
B1