Inventor · disambiguated record
Roy Lee Robertson, Jr.
Also filed as: ROBERTSON JR ROY LEE · ROBERTSON ROY · ROBERTSON ROY LEE
9 granted patents·4 pending applications·110 citations·filing 1990–2015
88Inventor score
Top patents by PatentIndex Score
13 records- 0183US7959379B2Bolt anchorROBERTSON JR ROY LEE·Filed 2009·Granted Jun 14, 2011·13 cites·18 claims
- 0282US8282318B2Roof bolt anchor with camming elementROBERTSON JR ROY LEE·Filed 2011·Granted Oct 9, 2012·10 cites·19 claims
- 0380US7179020B2Mine roof bolt anchoring system and methodROBERTSON JR ROY LEE·Filed 2005·Granted Feb 20, 2007·15 cites·18 claims
- 0466US6682268B2Method and apparatus for secondary roof support in an underground mineEARL PRODUCTS INC·Filed 2001·Granted Jan 27, 2004·19 cites·4 claims
- 0565US6986623B2Method and apparatus for anchoring a mine roof boltROBERTSON JR ROY LEE·Filed 2003·Granted Jan 17, 2006·16 cites·39 claims
- 0663US8164473B2Mine roof monitoring apparatusROBERTSON JR ROY LEE·Filed 2009·Granted Apr 24, 2012·3 cites·8 claims
- 0763US6637980B2Method and apparatus for re-tensioning a roof bolt in an underground mineEARL PRODUCTS INC·Filed 2001·Granted Oct 28, 2003·17 cites·12 claims
- 0859US5047628AHybrid switch with solid-state conditionILLINOIS TOOL WORKS·Filed 1990·Granted Sep 10, 1991·17 cites·21 claims
- 0949US8215875B2Bolt anchorROBERTSON JR ROY LEE·Filed 2011·Granted Jul 10, 2012·0 cites·18 claims
- 1039US2011070048A1Crimped cable bolt head and assemblyROBERTSON JR ROY LEE·Filed 2010·Application pending·0 cites
- 1137US2004115010A1Apparatus for providing secondary mine roof supportFiled 2003·Application pending·0 cites
- 1235US2015226248A1Torque Tension Breakaway NutROBERTSON JR ROY LEE·Filed 2015·Application pending·0 cites
- 1333US2016003375A1Versatile hanging system for roof support systemsROBERTSON JR ROY LEE·Filed 2015·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →