Granted Patent
Utility
US 6,407,581 · App. 09/817,215
High voltage multipurpose input/output circuit
Inventors:
Richard Hull, Eric Lee Schroeder
Patented Case
View Patent ↗
Granted: Jun 18, 2002
Filed: Mar 27, 2001
Inventors
Richard Hull
Eric Lee Schroeder
Assignee (at issue)
Microchip Technology Incorporated
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.