Granted Patent
Utility
US 4,490,956 · App. 06/456,342
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Inventors:
Joaquin J. Palacio, Carlos C. Cristobal
Patented Case
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Granted: Jan 1, 1985
Filed: Jan 7, 1983
Inventors
Joaquin J. Palacio
Carlos C. Cristobal
Assignee (at issue)
Gang-Nail Systems Limited
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.