John W. Campbell has been granted 20 US patents while listed as an inventor at Loop-A-Line . The first was granted in 1980 and the most recent in November 2025. John W. Campbell ranks #214,803 of 4,157,543 US inventors in our database (top 5.2%). Patent records list John W. Campbell in Sankt Gallen, AL, CH.
Patents per Year Patents granted per year, 1980 to 2024 Bar chart with a peak of 2 patents in 1982. peak 2 1980: 1 patents 1980 1982: 2 patents 1983: 2 patents 1983 1985: 1 patents 1986: 1 patents 1986 1989: 2 patents 1990: 2 patents 1990 1991: 1 patents 1999: 1 patents 1999 2004: 1 patents 2005: 1 patents 2005 2010: 1 patents 2011: 1 patents 2011 2016: 1 patents 2024: 1 patents 2024
Issued Patents All Time
Profile Widget
Showing 1–20 of 20 patents
Patent # Title Co-Inventors Date Approx Value ⓘ
D1103174 IT rack enclosure door Aaron R. Cox , Sterett Baxter Schanze , Camillo Sassano 2025-11-25
11866609 Optically clear adhesives containing a trialkyl borane complex initiator and photoacid Christopher J. Campbell , Mark F. Ellis , Kathleen S. Shafer , Wayne S. Mahoney 2024-01-09
$28,749,000
9267413 Exhaust system for an agricultural vehicle Daniel Alan Morey , Kain Knowles , Rajeshwar Adupala , Panos Tamamidis 2016-02-23
$12,333,000
7935251 Waste treatment apparatus — 2011-05-03
7794597 Treatment of waste mixture containing liquids and solids — 2010-09-14
6945096 Measurement and control of asphaltene agglomeration in hydrocarbon liquids Gregory M. Jones , Malcolm J. W. Povey 2005-09-20
$40,574,000
6687660 Hydrocarbon reservoir testing James Robinson 2004-02-03
5969237 Measurement and control of asphaltene agglomeration in hydrocarbon Liquids Gregory M. Jones , Malcolm J. W. Povey 1999-10-19
$20,012,000
5054727 Rapid racker Welbourne D. McGahee , James H. Muir 1991-10-08
4920686 Side stepper worms with rattle and sinker Welbourne D. McGahee 1990-05-01
4891508 Precision infrared position detector apparatus for touch screen system — 1990-01-02
$22,753,000
4873783 Side stepper worms with hook pocket Welbourne D. McGahee 1989-10-17
4862628 Side stepper worms Welbourne D. McGahee 1989-09-05
4612958 Boiler safety valve installations — 1986-09-23
4512412 Swinging fire apparatus pump operator panel — 1985-04-23
4387577 Boilers — 1983-06-14
4377072 Ceramic heat exchange module and apparatus and process utilizing same Larry H. Russell , Philip I. Robinson 1983-03-22
$11,022,000
4357907 Fluidized bed combustor with improved indirect heat exchanger units Larry H. Russell , Philip I. Robinson 1982-11-09
$3,651,000
4328594 Prosthetic foot Charles W. Childs 1982-05-11
4214398 Fishhook Lawrance W. Campbell 1980-07-29
