O Ring History

O Ring History The first patent for the O-ring, is dated May 12, 1896 as a Swedish patent. J O Lundberg  the inventor of the O-ring, received the patent. The US patent  for the O-ring was filed in 1937 by a then 72-year-old Danish born machinist,  Niels Christensen. Soon after emigrating to the USA in 1891, he patented…