Inventor · Fairhaven, MA, US

Derek A. Ladd

360Patents
43h-index
43Co-inventors
90Inventor score

Filing activity: Sep 2, 1998 → Jun 22, 2023

Most-cited inventions

PatentTitleAreaCited byStatus
US6180722A Dual core golf ball compositions Performing Operations; Transporting 181 Expired
US6180040A Method of forming a golf ball core Performing Operations; Transporting 176 Expired
US6688991B2 Golf ball with foam core and filled cover Human Necessities 142 Expired
US7255656B2 Multi-layer core golf ball Chemistry; Metallurgy 129 Expired
US6162135A Low compression, resilient golf balls including an inorganic sulfide catalyst and methods for making the same Human Necessities 118 Expired
US6692380B2 Golf ball with high density center Performing Operations; Transporting 116 Expired
US7452291B2 Foam-core golf balls Human Necessities 115 Expired
US6988962B2 Multi-layered core golf ball Chemistry; Metallurgy 99 Expired
US6291592A Low compression, resilient golf balls including aromatic catalyst and method for making same Human Necessities 98 Expired
US6916254B2 Golf ball with small inner core Human Necessities 97 Expired
US7125345B2 Low deformation golf ball Human Necessities 95 Expired
US6852044B2 Multi-layered core golf ball Chemistry; Metallurgy 90 Expired
US6852042B2 Golf ball Performing Operations; Transporting 78 Expired
US7410429B1 Negative hardness gradient inner core for dual core golf ball Human Necessities 77 Active
US7722482B2 Multi-layer core golf ball Human Necessities 74 Active
US7037965B2 Golf balls comprising glass ionomers, ormocers, or other hybrid organic/inorganic compositions Human Necessities 70 Expired
US7708654B2 Foam-core golf balls Human Necessities 68 Active
US6284840A Golf ball core compositions containing high Vicat softening temperature, resilient thermoplastic materials Human Necessities 66 Expired
US6995191B2 Multi-layer golf ball with a foamed intermediate layer Emerging Cross-Sectional Technologies 66 Expired
US7131915B2 Three-layer-cover golf ball Human Necessities 66 Expired
US7785216B2 Golf balls including mechanically hybridized layers and methods of making same Human Necessities 62 Active
US7935004B2 Golf balls having a low modulus HNP layer and a high modulus HNP layer Chemistry; Metallurgy 62 Active
US7371192B2 Golf ball Performing Operations; Transporting 62 Active
US6465578B1 Low compression, resilient golf balls including an organosulfur catalyst and method for making same Human Necessities 58 Expired
US6981926B2 Multi-layered core golf ball Performing Operations; Transporting 56 Expired

Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.