IP Library › Granted Patent US 5,597,308
Granted Patent Utility
US 5,597,308 · App. 08/340,599

Assembly including interlocking components for teaching mathematical concepts

Inventors: Richard Woldenberg, Lisa Hoffman
Patented Case View Patent ↗
Granted: Jan 28, 1997 Filed: Nov 16, 1994
Inventors
Richard Woldenberg
Lisa Hoffman

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Quick Facts
Patent No.
US 5,597,308
App. No.
08/340,599
Filed
1994-11-16
Granted
1997-01-28
Kind
A