Granted Patent
Utility
US 4,933,547 · App. 07/341,728
Method for external calibration of ion cyclotron resonance mass spectrometers
Inventor:
Robert B. Cody
Patented Case
View Patent ↗
Granted: Jun 12, 1990
Filed: Apr 21, 1989
Inventor
Robert B. Cody
Assignee (at issue)
Extrel FTMS, Inc.
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.