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Per Birch — 1 Patent

FLFlsmidth: 1 patents #6 of 42Top 15%

Copenhagen, DK: #1,912 of 3,500 inventorsTop 55%

Overall (All Time): #2,406,284 of 4,157,543Top 60%

1 Patents All Time

Per Birch has been granted 1 US patent while listed as an inventor at Flsmidth. All of these patents were granted in 1983. Per Birch ranks #2,406,284 of 4,157,543 US inventors in our database (top 57.9%). Patent records list Per Birch in Copenhagen, DK.

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #	Title	Co-Inventors	Date
4403952	Apparatus for driving a rotary drum, such as a rotary kiln	Christian Marcussen	1983-09-13

Per Birch — 1 Patent

Issued Patents All Time

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