Patent Leaderboard
USPTO Patent Rankings Data through Sept 30, 2025
DB

David John Buttle

APAea Technology Plc: 5 patents #1 of 68Top 2%
TPThe Boots Company Plc: 2 patents #23 of 152Top 20%
GE: 2 patents #13,562 of 36,430Top 40%
BLBaker Hughes Energy Technology Uk Limited: 1 patents #18 of 89Top 25%
TSThe University Of Sheffield: 1 patents #43 of 262Top 20%
Wantage, GB: #6 of 106 inventorsTop 6%
Overall (All Time): #292,949 of 4,157,543Top 8%
16 Patents All Time

Issued Patents All Time

Showing 1–16 of 16 patents

Patent #TitleCo-InventorsDate
11360050 Hoses, and detecting failures in reinforced hoses John C. McCarthy 2022-06-14
10765779 Medical implant Aileen Crawford-Corrie, John Haycock 2020-09-08
9851265 Apparatus and method for measuring properties of a ferromagnetic material 2017-12-26
9249657 System and method for monitoring a subsea well Pekka Tapani Sipilä{umlaut over ( )}, Nicholas Josep Ellson, John C. McCarthy, Sakethraman Mahalingam 2016-02-02
8316726 Biaxial stress management John C. McCarthy 2012-11-27
7876096 Detecting failures in flexible multistrand steel structures William J. Dalzell 2011-01-25
7268541 Detecting failures of flexible multistrand steel structures William J. Dalzell, Peter John Thayer, Stephen Frank Burch, Geoffrey Charles Eckold 2007-09-11
7215117 Measurement with a magnetic field 2007-05-08
7053606 Measurement of residual and thermally-induced stress in a rail William J. Dalzell, Peter John Thayer 2006-05-30
6964202 Detection of rolling contact fatigue Peter John Thayer, William J. Dalzell 2005-11-15
6854336 Measurement of stress in a ferromagnetic material 2005-02-15
6850055 Measurement of the variation of a material property with depth in a ferromagnetic material 2005-02-01
5828211 Determining stress in ferromagnetic materials from measurements of magnetic anisotropy and magnetic permeability Christopher Brian Scruby, Fiona Anne Ravenscroft, Carlo Guido de Michelis, Massimo Gori, Giampiero Antonelli 1998-10-27
5468480 Pharmaceutical composition of purified chymopapain Alan Barrett, Daniel H. Rich 1995-11-21
5380656 Chymopapain and method of purifying it on an inhibitory dipeptide affinity column Alan Barrett, Daniel H. Rich 1995-01-10
5106621 Cysteine proteinases, production and use Andrew D. Rowan 1992-04-21