Granted Patent
Utility
US 6,011,084 · App. 09/105,704
Erasable colored pencil lead
Inventors:
Jacob Leidner, David Hacker
Patented Case
View Patent ↗
Granted: Jan 4, 2000
Filed: Jun 26, 1998
Inventors
Jacob Leidner
David Hacker
Assignee (at issue)
BINNEY & SMITH 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.