Barbara Plain — 7 Patents at Learning Resources

Barbara Plain has been granted 7 US patents while listed as an inventor at Learning Resources. The first was granted in 1997 and the most recent in May 2023. Barbara Plain ranks #680,018 of 4,157,543 US inventors in our database (top 16.4%). Patent records list Barbara Plain in Des Plaines, IL, US.

Issued Patents All Time

Showing 1–7 of 7 patents

Patent #	Title	Co-Inventors	Date
11648485	Toy robot	Michael Blaustein, Elizabeth M. Ganrude	2023-05-16
D890861	Toy robot	Michael Blaustein, Elizabeth M. Ganrude	2020-07-21
7351062	Educational devices, systems and methods using optical character recognition	Gayle E. Gordon, Victor Kwok-ho Ng, Po Man Yuen	2008-04-01
6532314	Talking toy scanner	Tirza Ernst, Samuel Nguy	2003-03-11
6179682	Teaching toy telephone	Wai Hing Kim, Yau Chung Siu	2001-01-30
D420405	Teaching toy telephone	Lonnie C. Pogue, Brian Macowski	2000-02-08
D377949	Digital/analog teaching clock	Richard Woldenberg, Jane Woldenberg, Tirza Ernst	1997-02-11

Barbara Plain — 7 Patents

Issued Patents All Time

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