Trademarks
by Dave Rankin
Issue 27, July, 1975
To date, we have discussed NEARCUT which took us to 1922 and the
CAMBRIDGE Triangle C Logo paper labels which began in 1927. This month
we will fill the gap. As indicated in our NEARCUT discussion, a new
trademark made its appearance in trade advertising in late 1922. It was
the 
. We did not find any trademark
registration for the , therefore,
we do not have the informational advantage we have had with the other
trademarks.
In looking for some evidence that the
logo was actually used on the glassware in the early to mid-20's, we
located several possibilities. The best evidence is a Primrose bowl
with a stamped on the bottom. Our research
indicates that the Primrose color was introduced in early 1923 and does
not appear to have been produced for more than a couple of years.
Before we can discuss how long the
Logo was used, we must make a distinction. There are two marks of
differing sizes. Both are triangles of 3 equal sides. One measures
approximately 8mm per side while the other is 5mm.
The 8mm size is the older mark and is the one on the Primrose bowl mentioned above. It has also been observed on Rubina Honeycomb pieces. Our findings show that Rubina was introduced in 1925. Although we have no specific evidence of usage of the large mark in 1926, we would like to think that it was and that the switch to the smaller mark occurred simultaneously with the introduction of the CAMBRIDGE paper label in 1927.
The thought occurred to us that if the small Triangle C Logo started
at the same time as the Triangle C paper label, maybe both were
discontinued at the same time. This does appear to be substantially the
case. Many new lines were introduced by Cambridge from 1927 thru 1937
including Decagon, 3400, Tally Ho, Seashell and, in 1936, Caprice. We
have observed the Logo on all of these
lines but in decreasing frequency on later lines. For all practical
purposes, the usage of the small
Logo does coincide with the paper labels and, accordingly, we will use
the same date range of 1927-1937.
In summary, we have the large (8mm)
Logo used 1923-1926 and the small (5mm) C
Logo used 1927-1937.
We would also like to ask for some more assistance on the Logo mark. If each reader will send
in a list of articles in their own collections which have the large
mark, we can get a better feel for the extent and period of usage.
Additionally, it would be valuable to know if anyone has seen Pristine
pieces with the small mark. This information or any other information
you send will be used for later update articles. Send the information
to the author at the club's address: PO Box 416, Cambridge, Ohio
43762
Next month we will conclude our discussion of general line trademarks with GENUINE HAND MADE CAMBRIDGE paper labels.