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

James E. Bradfield — 7 Patents

PAPa: 7 patents #1 of 26Top 4%
Houston, TX: #3,335 of 21,073 inventorsTop 20%
Texas: #21,608 of 125,132 inventorsTop 20%
Overall (All Time): #680,018 of 4,157,543Top 20%
7 Patents All Time
James E. Bradfield has been granted 7 US patents while listed as an inventor at Pa. The first was granted in 1985 and the most recent in December 1988. James E. Bradfield ranks #680,018 of 4,157,543 US inventors in our database (top 16.4%). Patent records list James E. Bradfield in Houston, TX, US.

Patents per Year

Patents granted per year, 1985 to 1988Bar chart with a peak of 3 patents in 1987.peak 31985: 2 patents19851986: 1 patents19861987: 3 patents19871988: 1 patents1988

Issued Patents All Time

Showing 1–7 of 7 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
4792756 Method and apparatus for measuring axially extending defects in ferromagnetic elements Clive Lam, Marvin Milewits 1988-12-20 $13,146,000
4710712 Method and apparatus for measuring defects in ferromagnetic elements John E. Kahil, Mark S. Jaynes, Gordon L. Moake, Marvin Milewits, Curtis W. Bolton, III +2 more 1987-12-01 $9,878,000
4704580 Method and apparatus for measuring the depth of local defects in ferromagnetic elements Gordon L. Moake 1987-11-03 $25,466,000
4636727 Method and apparatus for detecting the location of defects in tubular sections moving past a well head John E. Kahil, Marvin Milewits, Clive Lam 1987-01-13
4611170 Coil apparatus mounted on an axially split spool for indicating wall thickness variations of a length of ferromagnetic pipe Roderic K. Stanley, Marvin Milewits, Robert C. Knauer, Jr. 1986-09-09
4555665 Magnetic flux method for measuring tubular wall thickness Roderic K. Stanley, Marvin Milewits, Robert C. Knauer, Jr. 1985-11-26
4492115 Method and apparatus for measuring defects in ferromagnetic tubing John E. Kahil, Mark S. Jaynes 1985-01-08