Inventor · disambiguated record
Ryohhei Sugiyama
Also filed as: SUGIYAMA Ryohhei
11 granted patents·1 pending application·7 citations·filing 2016–2025
81Inventor score
Technology areasG03G
Top patents by PatentIndex Score
12 records- 0186US9817345B2Fixing device, image forming apparatus, and method of controlling fixing deviceYAMANO MOTOYOSHI·Filed 2016·Granted Nov 14, 2017·3 cites·8 claims
- 0282US10191423B2Image forming apparatus including a fixing deviceSUGIYAMA Ryohhei·Filed 2017·Granted Jan 29, 2019·2 cites·18 claims
- 0379US9696672B2Drive transmission unit, fixing device with drive transmission unit, and image forming apparatus having fixing device with drive transmission unitONO HIROSHI·Filed 2016·Granted Jul 4, 2017·2 cites·19 claims
- 0474US2025321521A1Heating device, fixing device, and image forming apparatusSHIMOKAWA TOSHIHIKO·Filed 2025·Application pending·0 cites
- 0571US12422766B2Fixing device and image forming apparatus incorporating sameYOSHINAGA HIROSHI·Filed 2024·Granted Sep 23, 2025·0 cites·8 claims
- 0665US12353150B2Fixing device and image forming apparatusYOSHINAGA HIROSHI·Filed 2023·Granted Jul 8, 2025·0 cites·10 claims
- 0765US12197150B2Fixing device and image forming apparatus incorporating the sameMATSUDA RYOHEI·Filed 2023·Granted Jan 14, 2025·0 cites·12 claims
- 0863US12124194B2Heating device, fixing device, and image forming apparatusSUGIYAMA Ryohhei·Filed 2023·Granted Oct 22, 2024·0 cites·16 claims
- 0962US12197155B2Heating device, fixing device, and image forming apparatus with heat shield including first portion and second portionYOSHINAGA HIROSHI·Filed 2023·Granted Jan 14, 2025·0 cites·17 claims
- 1058US12386293B2Fixing device and image forming apparatus with a controller to switch between a first heating and a second heatingYAMASHITA KENTARO·Filed 2024·Granted Aug 12, 2025·0 cites·8 claims
- 1155US11703783B2Fixing device and image forming apparatusSUGIYAMA Ryohhei·Filed 2022·Granted Jul 18, 2023·0 cites·14 claims
- 1246US10401766B2Image forming apparatus and image forming method with temperature and power-based productivity rate selectionSUGIYAMA Ryohhei·Filed 2016·Granted Sep 3, 2019·0 cites·24 claims
Join the waitlist — get patent alerts
Get an alert when Ryohhei Sugiyama files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →