Robert Harr — 14 Patents at Harr Technologies

Robert Harr has been granted 14 US patents while listed as an inventor at Harr Technologies. The first was granted in 1999 and the most recent in September 2019. Robert Harr ranks #332,869 of 4,157,543 US inventors in our database (top 8.0%). Patent records list Robert Harr in Kasilof, AK, US.

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Showing 1–14 of 14 patents

Patent #	Title	Co-Inventors	Date
10422120	Forward articulating cleaning and removal apparatus and method	—	2019-09-24
9651167	Trenchless drainage structure replacement	—	2017-05-16
9650557	Green directional drilling fluid composition	—	2017-05-16
9290993	Method and system for installation of in-ground conduit	J. Dana Pruhs	2016-03-22
8556539	Trenchless drainage structure replacement	—	2013-10-15
8545130	Wick assembly and method for installing an underdrain	—	2013-10-01
8347446	Drainage structure cleaning tool	—	2013-01-08
8303215	Wick assembly and method for installing an underdrain	—	2012-11-06
7725978	Drainage structure cleaning apparatus	—	2010-06-01
7721375	Drainage structure cleaning tool	—	2010-05-25
7398785	Method for cleaning a culvert	—	2008-07-15
6647182	Echelle grating dense wavelength division multiplexer/demultiplexer	Andrew D. Sappey, Pei Huang, Gerry Murphy	2003-11-11
6421479	Apparatus and method facilitating optical alignment of a bulk optical multiplexer/demultiplexer	—	2002-07-16
5993137	Adjustable hoist for use with vehicle	—	1999-11-30

Robert Harr — 14 Patents

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