Inventor · disambiguated record

John E. Kotrla

Also filed as: KOTRLA JOHN E

2 granted patents·13 citations·filing 1991–2011

56Inventor score

Technology areasE21B

Files withBAROID TECHNOLOGY INC1 KOTRLA JOHN E1

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2 records

0175US8657013B2Riser systemKOTRLA JOHN E·Filed 2011·Granted Feb 25, 2014·8 cites·17 claims
0222US5116095AApparatus for lifting heavy equipmentBAROID TECHNOLOGY INC·Filed 1991·Granted May 26, 1992·5 cites·5 claims

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John E. Kotrla — Patent Inventor | PatentIndex