Assignee
SIGMA CORP
US·11 granted patents·17 pending applications·137 citations·filing 1979–2025
Top patents by PatentIndex Score
28 records- 0186US4621037AMethod for detecting endpoint of developmentSIGMA CORP·Filed 1985·Granted Nov 4, 1986·62 cites·8 claims
- 0275US7266875B2Joint restraint assemblySIGMA CORP·Filed 2006·Granted Sep 11, 2007·11 cites·4 claims
- 0374US2026086332A1Imaging optical systemSIGMA CORP·Filed 2025·Application pending·0 cites
- 0470US7185924B1Joint restraint assemblySIGMA CORP·Filed 2003·Granted Mar 6, 2007·17 cites·14 claims
- 0565US2026034561A1Submersible frame for maintaining a buoyant object in a flat state during a coating processSIGMA CORP·Filed 2024·Application pending·0 cites
- 0665US2025370233A1Variable magnification optical system and imaging apparatusSIGMA CORP·Filed 2025·Application pending·0 cites
- 0764US10036497B2Joint restraint devices and methods of using sameSIGMA CORP·Filed 2015·Granted Jul 31, 2018·2 cites·19 claims
- 0864US2025334778A1Imaging optical systemSIGMA CORP·Filed 2025·Application pending·0 cites
- 0963US2025172790A1Telephoto zoom lensSIGMA CORP·Filed 2024·Application pending·0 cites
- 1062US2025208379A1Large aperture ratio ultra wide angle lensSIGMA CORP·Filed 2024·Application pending·0 cites
- 1162US2025208387A1Imaging optical systemSIGMA CORP·Filed 2024·Application pending·0 cites
- 1262US2025321401A1Imaging optical systemSIGMA CORP·Filed 2025·Application pending·0 cites
- 1362US2025093627A1Large aperture ratio telephoto zoom lensSIGMA CORP·Filed 2024·Application pending·0 cites
- 1462US2025258361A1Optical systemSIGMA CORP·Filed 2024·Application pending·0 cites
- 1561US2025383527A1Optical systemSIGMA CORP·Filed 2025·Application pending·0 cites
- 1659US4338157AMethod for forming electrical connecting lines by monitoring the etch rate during wet etchingSIGMA CORP·Filed 1980·Granted Jul 6, 1982·27 cites·10 claims
- 1759US2025130410A1Imaging optical systemSIGMA CORP·Filed 2024·Application pending·0 cites
- 1859US2026036795A1Variable magnification optical systemSIGMA CORP·Filed 2025·Application pending·0 cites
- 1958US2025264702A1High power zoom lensSIGMA CORP·Filed 2025·Application pending·0 cites
- 2057US12448185B1Plastic meter lid and frame assembly for an in-ground meter boxSIGMA CORP·Filed 2023·Granted Oct 21, 2025·0 cites·18 claims
- 2156US12196935B2Imaging optical systemSIGMA CORP·Filed 2022·Granted Jan 14, 2025·0 cites·10 claims
- 2255US2025244566A1Zoom lensSIGMA CORP·Filed 2025·Application pending·0 cites
- 2345US2024019692A1Optical systemSIGMA CORP·Filed 2023·Application pending·0 cites
- 2443US2020385951A1Rotomolded reinforced concrete meter box lid and method of making sameSIGMA CORP·Filed 2019·Application pending·0 cites
- 2539US4624536AFour component zoom lensSIGMA CORP·Filed 1983·Granted Nov 25, 1986·7 cites·6 claims
- 2637US4288281AAppliance for adhering a sensing marker on a medium for recording informationSIGMA CORP·Filed 1979·Granted Sep 8, 1981·5 cites·7 claims
- 2736US4647171AFully automatic diaphragm control interchangeable lensSIGMA CORP·Filed 1985·Granted Mar 3, 1987·6 cites·7 claims
- 2835US11318515B1Large diameter pipe rounding tool and method of useSIGMA CORP·Filed 2021·Granted May 3, 2022·0 cites·26 claims
Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →