Class 411/497 - Stepped end

Subclass of Class 411 - Expanded, threaded, driven, headed, tool-deformed, or locked-threaded fastener
Definition: Subject matter wherein the piercing end comprises a series
No. of patents: 2
Last issue date: 10/27/1998

Number	Title	Issue Date
5826391	Concrete joint and method A formwork comprising a metal panel 11 having an upper portion 12, a lower portion 13 and a intermediate portion 14 displaced laterally out of the line of the panel 11, the portions 12 and 13 have spaced holes 15 through which reinforcing rods 16 project ...	10/27/1998
4728237	Drivable picture frame hanger A hanger adapted to be driven into a wooden frame member includes a one-piece stamped metal member having a head and a flat elongate symmetrical shank with a series of lands and grooves disposed on opposite sides of the longitudinal axis of the shank betw...	03/01/1988

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