How long have 5 lobe (Pentalobular) security screws existed?

How long have 5 lobe (Pentalobular) security screws existed?

I've found a few references going back as far as 2000, but feel like odd security screws go back much farther. Any fastener experts around here?

Submitted June 04, 2017 at 12:35AM by playaspec
via reddit http://ift.tt/2qOJpoZ

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How long have 5 lobe (Pentalobular) security screws existed?

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