Inventor
KAMITANI TOSHIMI
JP25 patents
⚠️ This page may combine multiple inventors who share the name “KAMITANI TOSHIMI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
MITSUBISHI PENCIL CO
18 patentsUS11427027B2Aug 30, 2022
Writing implement
MITSUBISHI PENCIL CO2 citations70
US9636940B2May 2, 2017
Writing instrument
MITSUBISHI PENCIL CO2 citations70
US9566818B2Feb 14, 2017
Writing instrument
MITSUBISHI PENCIL CO3 citations69
US12187068B2Jan 7, 2025
Fiber-bundled part for writing instruments, and pen tip and writing instrument using the fiber-bundled part
MITSUBISHI PENCIL CO0 citations62
US7883815B2Feb 8, 2011
Fuel-storing tank for fuel cell
MITSUBISHI PENCIL CO2 citations62
US7771890B2Aug 10, 2010
Method of preventing leak of liquid fuel
MITSUBISHI PENCIL CO3 citations62
US7615305B2Nov 10, 2009
Fuel reservoir for fuel cell
MITSUBISHI PENCIL CO5 citations62
US7579096B2Aug 25, 2009
Fuel reservoir for fuel cell
MITSUBISHI PENCIL CO3 citations62
US7063475B2Jun 20, 2006
Ink-storing body for writing utensil
MITSUBISHI PENCIL CO2 citations61
US12325255B2Jun 10, 2025
Writing instrument
MITSUBISHI PENCIL CO0 citations60
US11207913B2Dec 28, 2021
Erasing member and erasing tool using the same
MITSUBISHI PENCIL CO0 citations59
US12227024B2Feb 18, 2025
Writing implement
MITSUBISHI PENCIL CO0 citations56
US12207722B2Jan 28, 2025
Applicator
MITSUBISHI PENCIL CO0 citations54
US11148460B2Oct 19, 2021
Writing instrument
MITSUBISHI PENCIL CO0 citations51
US7851106B2Dec 14, 2010
Fuel cartridge
MITSUBISHI PENCIL CO0 citations51
US7727657B2Jun 1, 2010
Fuel reservoir for fuel cell
MITSUBISHI PENCIL CO1 citations51
US7951504B2May 31, 2011
Fuel cartridge
MITSUBISHI PENCIL CO1 citations50
US7837956B2Nov 23, 2010
Gas generation apparatus
MITSUBISHI PENCIL CO0 citations41