Sandler Greenblum & Bernstein
Flexible printed circuit board
 A flexible printed circuit board is provided including a flexible sheet having at least one electrically conductive layer, with a printed circuit pattern and a fold retainer pattern formed in one of the electrically conductive layers. The fold retainer pattern is electrically isolated from the printed circuit pattern. The fold retainer pattern has notches that indicate where the sheet is to be folded when the flexible sheet is folded, it is held in its folded shape by the fold retainer pattern. 
Asahi Kogaku Kogyo Kabushiki Kaisha
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Masaki
Sano