Granted Patent
Utility
US 4,573,575 · App. 06/672,649
Needle packaging
Inventors:
Siegmar Bergrath, Fritz Kappertz
Patented Case
View Patent ↗
Granted: Mar 4, 1986
Filed: Nov 19, 1984
Inventors
Siegmar Bergrath
Fritz Kappertz
Assignee (at issue)
Singer Spezialnadelfabrik 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.