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Subject:C, R, and TM : all have *specific* meanings From:KnoxML1 <KnoxML1 -at- TEOMAIL -dot- JHUAPL -dot- EDU> Date:Wed, 1 Nov 1995 17:05:20 EST
Someone just wrote:
>Circle R stands for "copyright" and TM stands for "trademark."
No, circle C is copyright; cirle R is *registered trademark*;
^^^ ^^^^^^^^^^^^^^^^^^^^
TM is *unregistered trademark*.
^^^^^^^^^^^^
The following is from _The New York Public Library Writer's Guide to
Style and Usage_, p. 448. (This book also has a fairly extensive
discussion of trademark law; it is well researched and up to date):
"_Circle C_ means copyright. Circle R means a trademark that is
registered with the U.S. Patent and Trademark Office; TM and SM
(service mark) are used when a trademark (for a product) or a service
mark (for a service) is not registered; registration is not required
for protection under the law. These marks are not interchangeable,
and the owner's use, as shown on packaging or in written product
materials, should be followed."
Margaret Knox
Technical Writer & Editor
margaret -dot- knox -at- jhuapl -dot- edu
