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Tirza Ernst — 4 Patents

LRLearning Resources: 3 patents #3 of 25Top 15%
Highland Park, IL: #158 of 599 inventorsTop 30%
Illinois: #21,640 of 84,256 inventorsTop 30%
Overall (All Time): #1,080,739 of 4,157,543Top 30%
4 Patents All Time
Tirza Ernst has been granted 4 US patents while listed as an inventor at Learning Resources. The first was granted in 1997 and the most recent in November 2006. Tirza Ernst ranks #1,080,739 of 4,157,543 US inventors in our database (top 26.0%). Patent records list Tirza Ernst in Highland Park, IL, US.

Patents per Year

Patents granted per year, 1997 to 2006Bar chart with a peak of 1 patents in 1997.peak 11997: 1 patents19971998: 1 patents19982003: 1 patents20032006: 1 patents2006

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #TitleCo-InventorsDate
D531669 Educational device Gayle E. Gordon 2006-11-07
6532314 Talking toy scanner Barbara Plain, Samuel Nguy 2003-03-11
D400813 Teaching scale Eric Toriumi 1998-11-10
D377949 Digital/analog teaching clock Richard Woldenberg, Jane Woldenberg, Barbara Plain 1997-02-11

Frequent Collaborators

Barbara Plain2 shared
Richard Woldenberg1 shared
Samuel Nguy1 shared
Jane Woldenberg1 shared
Eric Toriumi1 shared
Gayle E. Gordon1 shared

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