Granted Patent
Utility
US 6,578,822 · App. 09/804,841
Device for limiting the upper rotation speed of a balancing hoist
Inventors:
Jorgen Heun, Markus Lobel, Klaus Winter
Patented Case
View Patent ↗
Granted: Jun 17, 2003
Filed: Mar 13, 2001
Inventors
Jorgen Heun
Markus Lobel
Klaus Winter
Assignee (at issue)
Demag Cranes & Components GmbH
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.