Inventor

HWANG HYEON SEOK

KR34 patents

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

HWANG HYEON SEOK

POSCO

Steel sheet for hot press forming with excellent corrosion resistance and weldability, forming member, and manufacturing method therefor

Plating steel sheet for hot press forming, forming member using same, and manufacturing method therefor

Aluminum alloy-plated steel sheet having excellent workability and corrosion resistance and method for manufacturing same

Hot-dip galvanized steel sheet having excellent surface appearance and low-temperature bonding brittleness

Hot-dip galvanized steel sheet having excellent low-temperature adhesion and workability

High-manganese hot-dip aluminum-coated steel sheet having excellent coating adhesion

Plated steel sheet for hot press forming having excellent weldability and corrosion resistance, forming member, and manufacturing method thereof

Austenite-based molten aluminum-plated steel sheet having excellent properties of plating and weldability

Hot dip aluminized steel material having excellent corrosion resistance and workability, and manufacturing method therefor

Aluminum-based alloy-plated steel sheet having excellent workability and corrosion resistance, and manufacturing method therefor

Aluminum alloy-plated steel sheet, hot-formed member, and methods for manufacturing aluminum alloy-plated steel sheet and hot-formed member

Aluminum alloy-plated steel sheet having excellent workability and corrosion resistance and method for manufacturing same

Steel sheet having excellent image clarity after painting

Plated steel sheet for hot press forming having excellent weldability and corrosion resistance, forming member, and manufacturing method thereof

Hot-rolled galvanized steel sheet having excellent galling resistance, formability and sealer-adhesion property and method for manufacturing same

SAMSUNG ELECTRO MECH

Step attenuator

Circuit and method for compensating for offset voltage

Bias current generating apparatus with adjustable temperature coefficient

Apparatus with transmission route switching of radio frequency signals and radio frequency module

Band selection switch circuit and amplifier

Frequency conversion circuit

Photodiode integrated circuit having multiple gain states

Transformer and method of manufacturing the same

Power amplifier

Transformer and method of manufacturing the same

Power amplifier

Bias circuit and amplifying device having temperature compensation function

Active balun circuit

POSCO CO LTD

Hot press formed product having excellent corrosion resistance and method for preparing same

Plating steel sheet for hot press forming, forming member using same, and manufacturing method therefor

Plated steel sheet for hot press forming

JO BYEONG HAK

Power amplifier

HYUNDAI MOTOR CO LTD

Vehicle and method of controlling the same

HWANG HYEON SEOK

Power amplifier break down characteristic