Granted Patent
Utility
US 4,830,970 · App. 06/848,072
Nutrient substrate carrier
Inventors:
Rolf Madaus, Gerhard Bruesewitz
Patented Case
View Patent ↗
Granted: May 16, 1989
Filed: Apr 4, 1986
Inventors
Rolf Madaus
Gerhard Bruesewitz
Assignee (at issue)
Dr. Madaus GmbH & Co
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.