Granted Patent
Utility
US 6,007,478 · App. 08/970,135
Cannula having constant wall thickness with increasing distal flexibility and method of making
Inventors:
Thorsten Siess, Helmut Reul, Gunter Rau, Jens Hutzenlaub, Peter Robinson Brown
Patented Case
View Patent ↗
Granted: Dec 28, 1999
Filed: Nov 13, 1997
Inventors
Thorsten Siess
Helmut Reul
Gunter Rau
Jens Hutzenlaub
Peter Robinson Brown
Assignee (at issue)
Impella Cardiotechnik AG
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.