Inventor
CHAPMAN JOHN A
US10 patents
⚠️ This page may combine multiple inventors who share the name “CHAPMAN JOHN A”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
VALMONT INDUSTRIES
9 patentsUS6131833AOct 17, 2000
Tracked drive tower for a self-propelled irrigation system
VALMONT INDUSTRIES59 citations95
US5678771AOct 21, 1997
Chemical distribution system
VALMONT INDUSTRIES61 citations95
US4729514AMar 8, 1988
Means for seeding through a center pivot irrigation system
VALMONT INDUSTRIES34 citations91
US6095439AAug 1, 2000
Corner irrigation system including a GPS guidance system
VALMONT INDUSTRIES52 citations86
US4434936AMar 6, 1984
Irrigation system
VALMONT INDUSTRIES25 citations80
US5356080AOct 18, 1994
Water inlet for a linear move irrigation system
VALMONT INDUSTRIES11 citations72
US5265810ANov 30, 1993
Water inlet for a linear move irrigation system
VALMONT INDUSTRIES9 citations72
US4660775AApr 28, 1987
Means for seeding through a center pivot irrigation system
VALMONT INDUSTRIES16 citations72
US4609147ASep 2, 1986
Water delivery machine for an irrigation system
VALMONT INDUSTRIES11 citations68