Inventor · Memphis, TN, US

William D. Armstrong

66Patents
21h-index
48Co-inventors
88Inventor score

Filing activity: Mar 26, 1979 → May 19, 2022

Most-cited inventions

PatentTitleAreaCited byStatus
US8628578B2 Expandable interbody implant and methods of use Mechanical Engineering; Lighting; Heating 325 Active
US9445919B2 Expandable interbody implant and methods of use Human Necessities 104 Active
US8480747B2 Interbody spinal implants with extravertebral support plates Human Necessities 90 Active
US9937053B2 Expandable interbody implant Human Necessities 81 Active
US8454694B2 Interbody device and plate for spinal stabilization and instruments for positioning same Human Necessities 69 Active
US9872779B2 Expandable interbody implant and methods of use Mechanical Engineering; Lighting; Heating 65 Active
US9414936B2 Expandable interbody implant and methods of use Mechanical Engineering; Lighting; Heating 62 Active
US8080062B2 Intervertebral implant with fixation mechanism Human Necessities 61 Active
US10137007B2 Geared cam expandable interbody implant and method of implanting same Human Necessities 60 Active
US4842467A Concrete screw Mechanical Engineering; Lighting; Heating 53 Expired
US10137006B2 Geared cam expandable interbody implant and method of implanting same Human Necessities 44 Active
US5504052A Silver catalyst preparation Emerging Cross-Sectional Technologies 43 Expired
US8613761B2 Surgical implant with an anti-backout feature Human Necessities 37 Active
US10195050B2 Expandable interbody implant and methods of use Human Necessities 36 Active
US8465547B2 Modular interbody devices and methods of use Human Necessities 34 Active
US8690948B2 Interbody device and plate for spinal stabilization and instruments for positioning same Human Necessities 32 Active
US10932920B2 Geared cam expandable interbody implant and method of implanting same Human Necessities 31 Active
US5646087A Promoted silver acatalyst preparation Emerging Cross-Sectional Technologies 26 Expired
US11033402B2 Expandable interbody implant Human Necessities 24 Active
US11135071B2 Geared cam expandable interbody implant and method of implanting same Human Necessities 23 Active
US5645515A Stilt system Human Necessities 21 Expired
US4342667A Process for preparing a silver catalyst Emerging Cross-Sectional Technologies 21 Expired
US4555501A Process for preparing silver catalysts Chemistry; Metallurgy 19 Expired
US4760042A Process for preparing an alkali metal-promoted silver catalyst Emerging Cross-Sectional Technologies 17 Expired
US10327913B2 Pivotable interbody implant system Human Necessities 17 Active

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