Pipe joints or couplings – U-type
Reexamination Certificate
2006-02-28
2006-02-28
Hewitt, James M. (Department: 3679)
Pipe joints or couplings
U-type
C285S235000, C285S236000, C285S135100, C004S679000
Reexamination Certificate
active
07004508
ABSTRACT:
A flexible drain element is used in place of a trap and has a section that is flexible with a stiffness that is selected to make clearing blockages easy and expeditious.
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Flynn Barbara J.
Flynn Marvin L.
Hewitt James M.
Schoonover Donald R.
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