Inventor · San Mateo, CA, US

Mark O. Freeman

47Patents
15h-index
53Co-inventors
84Inventor score

Filing activity: Nov 14, 1991 → Jun 19, 2015

Most-cited inventions

PatentTitleAreaCited byStatus
US5381253A Chiral smectic liquid crystal optical modulators having variable retardation Physics 260 Expired
US7777960B2 Wide field of view head-up display system Physics 245 Active
US7656585B1 Embedded relay lens for head-up displays or the like Physics 226 Active
US7589901B2 Substrate-guided relays for use with scanned beam light sources Physics 141 Active
US7959308B2 Substrate-guided display with improved image quality Physics 116 Active
US7834867B2 Integrated photonics module and devices using integrated photonics modules Physics 87 Active
US7710655B2 Display with image-guiding substrate Physics 69 Active
US10083522B2 Image based measurement system Physics 54 Active
US7580007B2 Apparatus and method for bi-directionally sweeping an image beam in the vertical dimension and related apparati and methods Electricity 37 Active
US7901084B2 Image projector with display modes Electricity 33 Active
US7839575B2 Optical device for use with scanned beam light sources Physics 25 Active
US6188132A Two-wavelength semiconductor laser diode package for use on the read/write head of an optical drive capable of reading different types of optical discs Electricity 23 Expired
US7715103B2 Buried numerical aperture expander having transparent properties Physics 22 Active
US8152307B2 Diffractive optical element having periodically repeating phase mask and system for reducing perceived speckle Physics 20 Active
US7986315B2 Integrated photonics module and devices using integrated photonics modules Physics 15 Active
US5523993A Holographic optical element for optical disk pickup head Physics 14 Expired
US5652744A Single surface diffractive element for optical pickup heads Physics 14 Expired
US6211511A Dual-wavelength optical pickup head Electricity 13 Expired
US7978189B2 Integrated photonics module and devices using integrated photonics modules Physics 12 Active
US8355013B2 Integrated photonics module and devices using integrated photonics modules Physics 10 Active
US7791807B2 Avoiding interference artifacts in a head-up display or a reflected see-through type display Physics 9 Active
US8111336B2 Correcting scanned projector distortion by varying the scan amplitude Electricity 9 Active
US8446342B2 Projection system with multi-phased scanning trajectory Physics 8 Active
US7736006B2 Substrate-guided display with improved image quality Physics 8 Active
US7905603B2 Substrate-guided display having polarization selective input structure Physics 7 Active

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