Dating Guide Addendum

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Addendum 1.

Patent Summary

About Vernon Fitment in Canada.
I believe Loring made a minor typo by writing the patent number - instead of 356090, being 325090 as we can see in the patent record. Loring also mentions that the patent would have been registered in 1934 or '35 and was granted in '35 or '36. In fact, this patent was granted on August 16, 1932 - a few years earlier than he expected (he also can not determine the period in which the patent was applied).
According to the official patent record, the patent expired 17 years later, i.e. on August 16, 1949. Possibly it was used during this period on pipes directed to the Canadian market. It seems, that the fitment was not a tremendous success, and perhaps the production ceased before this period but we need time to see if more pipes with that patent will appear. Anyhow, it's a plausible possibility that the patent was used during that time. We also know now that we can find pipes with this patent sooner than we thought.

  • See the patent file here.
  • See the patent record on offcial Canadian Intellectual Property Office here.



Addendum 2.

Patent Summary

About Inner Tube w/ Flange registred in Canada.


13:17, 6 July 2020 (CDT)