NEILSEN KARL P has a total of 11 patent applications. Its first patent ever was published in 1925. It filed its patents most often in United States. Its main competitors in its focus markets engines, pumps and turbines, civil engineering and machines are SPEARS HARRY L, CANADA TIEFBOHRGERAETE UND MAS and STRATABOLT PROPRIETARY LTD.
# | Country | Total Patents | |
---|---|---|---|
#1 | United States | 11 |
# | Industry | |
---|---|---|
#1 | Engines, pumps and turbines | |
#2 | Civil engineering | |
#3 | Machines | |
#4 | Mechanical elements |
# | Technology | |
---|---|---|
#1 | Pumps | |
#2 | Earth drilling | |
#3 | Unspecified technologies | |
#4 | Lubricating |
# | Name | Total Patents |
---|---|---|
#1 | Neilsen Karl P | 11 |
#2 | Byers Daniel E | 1 |
Publication | Filing date | Title |
---|---|---|
US2628571A | Seat assembly for pump cages | |
US2294568A | Ball valve cage | |
US2206466A | Duplex pump | |
US1717619A | Multiple-tube inserted pump | |
US1757329A | Oil-well flow device | |
US1676661A | Standing-valve puller | |
US1628901A | Pump-plunger assembly | |
US1628900A | Deep-well gas and oil separator | |
US1703428A | Well heating and pumping system | |
US1608114A | Oil pump | |
US1649971A | Oil pump |