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Christopher L. Birch — 2 Patents

UNUnknown: 2 patents #12,644 of 83,584Top 20%

Barnstaple, GB: #4 of 24 inventorsTop 20%

Overall (All Time): #1,709,992 of 4,157,543Top 45%

2 Patents All Time

Christopher L. Birch has been granted 2 US patents while listed as an inventor at Unknown. All of these patents were granted in 1992. Christopher L. Birch ranks #1,709,992 of 4,157,543 US inventors in our database (top 41.1%). Patent records list Christopher L. Birch in Barnstaple, GB.

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date
D331267	Toy	David I. Shaw	1992-11-24
5110316	Practical joke device	David I. Shaw	1992-05-05

Christopher L. Birch — 2 Patents

Issued Patents All Time

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