Inventor

AZUMA KEIJI

JP5 patents

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

SUMITOMO BAKELITE CO

4 patents

US5413838AMay 9, 1995

Both-side roughened copper foil with protection film

SUMITOMO BAKELITE CO24 citations89

US5320919AJun 14, 1994

Copper foil for inner layer circuit of multi-layered printed circuit board, method of producing the same and multi-layered printed circuit board having the same

SUMITOMO BAKELITE CO19 citations79

US5286330AFeb 15, 1994

Method of producing copper-clad laminated board

SUMITOMO BAKELITE CO14 citations70

US4299947ANov 10, 1981

Process for producing quick-curing phenolic resin

SUMITOMO BAKELITE CO4 citations59

PANASONIC CORP

1 patent

US9013056B2Apr 21, 2015

Backup power source device and automobile equipped with same

PANASONIC CORP3 citations57