Inventor
ITO MASAMITSU
JP49 patents
⚠️ This page may combine multiple inventors who share the name “ITO MASAMITSU”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
WACOM CO LTD
40 patentsUSD897341SSep 29, 2020
Cartridge for an electronic pen
WACOM CO LTD22 citations94
US6952201B2Oct 4, 2005
Three-dimensional information detecting device, three-dimensional information detecting sensor device, and three-dimensional information indicating device
WACOM CO LTD31 citations92
US6433781B1Aug 13, 2002
Orientation-detecting apparatus, orientation-detecting method, orientation-detecting sensor device and orientation-designating device
WACOM CO LTD28 citations92
USD1001130SOct 10, 2023
Cartridge for an electronic pen
WACOM CO LTD5 citations86
USD978966SFeb 21, 2023
Cartridge for an electronic pen
WACOM CO LTD7 citations86
USD978243SFeb 14, 2023
Cartridge for an electronic pen
WACOM CO LTD6 citations86
USD966268SOct 11, 2022
Cartridge for an electronic pen
WACOM CO LTD6 citations86
USD947192SMar 29, 2022
Cartridge for an electronic pen
WACOM CO LTD6 citations86
USD946576SMar 22, 2022
Cartridge for an electronic pen
WACOM CO LTD6 citations86
US9513719B2Dec 6, 2016
Pen pressure detecting module and position indicator
WACOM CO LTD11 citations84
USD968408SNov 1, 2022
Cartridge for an electronic pen
WACOM CO LTD4 citations73
US10866657B2Dec 15, 2020
Integrated circuit and electronic pen
WACOM CO LTD2 citations73
US10768720B2Sep 8, 2020
Electronic pen
WACOM CO LTD2 citations73
US10345930B2Jul 9, 2019
Magnetic core coil and electronic pen
WACOM CO LTD2 citations73
US11385725B2Jul 12, 2022
Electronic erasing device and writing information processing system
WACOM CO LTD5 citations71
US12498807B2Dec 16, 2025
Method for adjusting resonance frequency of resonance circuit included in electronic pen, electronic pen, and method for manufacturing electronic pen
WACOM CO LTD0 citations62
US12492919B2Dec 9, 2025
Position indicator
WACOM CO LTD0 citations62
US12340035B2Jun 24, 2025
Electronic pen cartridge and electronic pen
WACOM CO LTD0 citations62
US12111989B2Oct 8, 2024
Method for adjusting resonance frequency of resonance circuit included in electronic pen, electronic pen, and method for manufacturing electronic pen
WACOM CO LTD0 citations62
US12056297B2Aug 6, 2024
Electronic pen cartridge and electronic pen
WACOM CO LTD1 citations62
US12001618B2Jun 4, 2024
Knock-type electronic pen including first and second position indicators located at different ends of a tubular casing
WACOM CO LTD1 citations62
US11940301B2Mar 26, 2024
Position indicator
WACOM CO LTD0 citations62
US11762487B2Sep 19, 2023
Method for adjusting resonance frequency of resonance circuit included in electronic pen, electronic pen, and method for manufacturing electronic pen
WACOM CO LTD0 citations62
US11714498B2Aug 1, 2023
Electronic pen core body and electronic pen
WACOM CO LTD0 citations62
US11687172B2Jun 27, 2023
Electronic pen cartridge and electronic pen
WACOM CO LTD0 citations62
US11669176B2Jun 6, 2023
Integrated circuit and electronic pen
WACOM CO LTD0 citations62
US11573649B2Feb 7, 2023
Electronic pen core body and electronic pen
WACOM CO LTD0 citations62
US11360584B2Jun 14, 2022
Electronic pen
WACOM CO LTD0 citations62
US11327584B2May 10, 2022
Integrated circuit and electronic pen
WACOM CO LTD0 citations62
US11169625B2Nov 9, 2021
Electronic pen
WACOM CO LTD0 citations62
US6928383B2Aug 9, 2005
Three-dimensional information detecting system, three-dimensional information detecting device and input device for three-dimensional information detecting system
WACOM CO LTD4 citations62
US11662834B2May 30, 2023
Electronic erasing device and writing information processing system
WACOM CO LTD0 citations60
US12293038B2May 6, 2025
Position detection apparatus configured to detect the positions of multiple position indicators, and position detection method
WACOM CO LTD0 citations56
US11599220B2Mar 7, 2023
Position detection apparatus configured to detect the positions of multiple position indicators, and position detection method
WACOM CO LTD0 citations56
US12405679B2Sep 2, 2025
Position detection sensor and position detection device
WACOM CO LTD0 citations52
US11725963B2Aug 15, 2023
Position detection sensor and position detection device
WACOM CO LTD0 citations52
US12169602B2Dec 17, 2024
Communication system and terminal apparatus
WACOM CO LTD0 citations51
US12591318B2Mar 31, 2026
Pen input device sheet with elastic layer having recessed protruding pattern facing a position detecting device
WACOM CO LTD0 citations50
US10452161B2Oct 22, 2019
Position indicator including switch circuit that performs changeover between first resonance circuit and second resonance circuit
WACOM CO LTD0 citations41
US7428469B2Sep 23, 2008
Three-dimensional-information detecting system and three-dimensional-information inputting device
WACOM CO LTD0 citations41