Granted Patent
Utility
US 4,249,971 · App. 06/033,253
Process for making elastomeric hose
Inventors:
Crescencio T. Yap, Leonard Castelbaum
Patented Case
View Patent ↗
Granted: Feb 10, 1981
Filed: Apr 25, 1979
Inventors
Crescencio T. Yap
Leonard Castelbaum
Assignee (at issue)
ARTERICA 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.