Pi Day

Whether you celebrate with pizza or with pie or with something else round, Happy Pi Day!

(March 14 = 3.14, π = 3.1415926...., so Pi Day is most appropriately celebrated at 1:59)

In honor of this nerdy holiday, here's some pi-related patents

...and trademarks, which you can find by searching with the design code 24.17.11 in the Trademark Electronic Search System.

These examples demonstrate some of the differences and similarities between patent searching and trademark searching.  For patents, the CSC (and USPC) are helpful for strategic searching, providing structure within which to search.  For trademarks, the Design Search Code provides similar functionality. Come visit the Patent and Trademark Resource Center at the Central Library for more searching tips!

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