Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
RB

Ronald A. Barr — 36 Patents

RRRead Rite: 19 patents #4 of 255Top 2%
W(Western Digital (Fremont): 12 patents #57 of 473Top 15%
NANanosys: 1 patents #105 of 152Top 70%
TRTransphorm: 1 patents #24 of 34Top 75%
Lompoc, CA: #41 of 2,245 inventorsTop 2%
California: #13,468 of 386,348 inventorsTop 4%
Overall (All Time): #92,222 of 4,157,543Top 3%
36 Patents All Time
Ronald A. Barr has been granted 36 US patents while listed as an inventor at Read Rite. The first was granted in 1993 and the most recent in October 2025. Ronald A. Barr ranks #92,222 of 4,157,543 US inventors in our database (top 2.2%). Patent records list Ronald A. Barr in Lompoc, CA, US.

Patents per Year

Patents granted per year, 1993 to 2019Bar chart with a peak of 11 patents in 2002.peak 111993: 1 patents19931995: 1 patents1996: 1 patents19962000: 2 patents2001: 3 patents20012002: 11 patents2003: 1 patents20032004: 8 patents2005: 2 patents20052006: 2 patents2009: 1 patents20092013: 1 patents2019: 1 patents2019

Issued Patents All Time

Showing 1–25 of 36 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
12451468 III-N devices with improved reliability Carl Joseph Neufeld, David Michael Rhodes, Liangguo Shen 2025-10-21
10319648 Conditions for burn-in of high power semiconductors Kurt Vernon Smith, Likun Shen, David Michael Rhodes, James Leroy McKay 2019-06-11
8540889 Methods of generating liquidphobic surfaces Jason Hartlove, Robert S. Dubrow 2013-09-24
7611440 Propulsion system 2009-11-03
7111382 Methods for fabricating redeposition free thin film CPP read sensors Kenneth E. Knapp, Lien-Chang Wang, Benjamin P. Law, James Spallas 2006-09-26 $6,690,000
7023658 Submicron track-width pole-tips for electromagnetic transducers Kenneth E. Knapp, Zhupei Shi, Billy W. Crue, Jr. 2006-04-04 $6,350,000
6958885 Insulation layer structure for inductive write heads and method of fabrication Yingjian Chen, Kyusik Sin 2005-10-25 $5,147,000
6954332 Ultra-short yoke and ultra-low stack height writer and method of fabrication Liubo Hong, Dashun Steve Zhou 2005-10-11 $5,561,000
6833979 Structure and method for redeposition free thin film CPP read sensor fabrication Kenneth E. Knapp, Lien-Chang Wang, Benjamin P. Law, James Spallas 2004-12-21 $7,207,000
6816345 Magnetoresistive sensors having submicron track widths and method of making Kenneth E. Knapp, Myron R. Cagan, Mark D. Thomas 2004-11-09 $6,546,000
6801408 Data storage and retrieval apparatus with thin film read head having a planar sensor element and an extra gap and method of fabrication thereof Yingjian Chen, Hau-Ching Tong 2004-10-05 $4,411,000
6765756 Ultra-short yoke and ultra-low stack height writer and method of fabrication Liubo Hong, Dashun Steve Zhou 2004-07-20 $21,632,000
6762910 Data storage and retrieval apparatus with thin film read head having inset extra gap insulation layer and method of fabrication Kenneth E. Knapp, Zi-Wen Dong, Russel Stearns, Bill Crue 2004-07-13 $21,701,000
6735850 Thin film read head structure with improved bias magnet-to-magnetoresistive element interface and method of fabrication Matthew R. Gibbons, Kenneth E. Knapp, Benjamin P. Law, James Spallas, Ming Zhao 2004-05-18 $7,734,000
6724569 Thin film writer with multiplayer write gap Yingjian Chen, Kyusik Sin 2004-04-20 $5,214,000
6687977 CPP magnetoresistive device and method for making same Kenneth E. Knapp 2004-02-10 $3,111,000
6657816 Thin film inductive read/write head with a sloped pole Alguo Feng 2003-12-02
6490125 Thin film write head with improved yoke to pole stitch 2002-12-03 $2,667,000
6487056 Thin film read head structure with improved bias magnet-to-magnetoresistive element interface and method of fabrication Matthew R. Gibbons, Kenneth E. Knapp, Benjamin P. Law, James Spallas, Ming Zhao 2002-11-26 $1,673,000
6469877 Spin valve device with improved exchange layer defined track width and method of fabrication Kenneth E. Knapp 2002-10-22 $1,220,000
6466401 Thin film write head with interlaced coil winding and method of fabrication Liubo Hong 2002-10-15 $790,000
6452742 Thin film write having reduced resistance conductor coil partially recessed within middle coat insulation Bill Crue, Zhupei Shi, Mark D. Thomas 2002-09-17 $851,000
6445553 Method and system for fabricating a high density magnetoresistive device Robert Earl Rottmayer 2002-09-03 $548,000
6433970 Structure and method for redeposition free thin film CPP read sensor fabrication Kenneth E. Knapp, Lien-Chang Wang, Benjamin P. Law, James Spallas 2002-08-13 $354,000
6421212 Thin film read head structure with improved bias magnet-to-magnetoresistive element interface and method of fabrication Matthew R. Gibbons, Kenneth E. Knapp, Benjamin P. Law, James Spallas, Ming Zhao 2002-07-16 $802,000