Zipper

wiktionary

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1925, zip +‎ -er. The trade name was registered in 1925 by B.F. Goodrich for “boots made of rubber and fabric,” claiming use of the name since June 1923. No longer a registered trademark.

etymonline

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zipper (n.)

1925, probably an agent noun from zip (v.1). The trademark taken out on the name that year applied to a boot with zippers, not to the "lightning fastener" itself, which was so called by 1927.