Granted Patent
Utility
US 6,549,152 · App. 09/937,341
1-bit digital-analog converter to convert digital information into current and voltage pulses
Inventor:
Helmut Kling
Patented Case
View Patent ↗
Granted: Apr 15, 2003
Filed: Sep 24, 2001
Inventor
Helmut Kling
Assignee (at issue)
Siemens Aktiengesellschaft
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.