Inventor

TSUKAHARA KEIJI

JP4 patents

⚠️ This page may combine multiple inventors who share the name “TSUKAHARA KEIJI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

NICHIAS CORP

2 patents

US11535004B2Dec 27, 2022

Soundproofing material

NICHIAS CORP4 citations65

US12415898B2Sep 16, 2025

Porous body

NICHIAS CORP0 citations52

TSUKAHARA KEIJI

1 patent

US8066146B2Nov 29, 2011

Insulated container and method of manufacturing the same

TSUKAHARA KEIJI3 citations51

NIWA TAKAHIRO

1 patent

US9593798B2Mar 14, 2017

Pipe cover, pipe structure and vehicle

NIWA TAKAHIRO1 citations44