Inventor

LIU YU-CHUN

TW30 patents

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

LIU YU-CHUN

SUPER POWER TOOLS CO LTD

Cabinet hardware jig

Tenon jig

Woodworking machinery electronic control panel

Tooling guide for a mortise and tenon joint

Clamp

Intuitive electric lifting device for woodworking trimming machine

Workpiece guiding device

QUALCOMM INC

Frequency selective coupler

Tunable, broadband directional coupler circuits employing an additional, selectable coupling circuit(s) for controlling frequency response

Surface mount passive component shorted together

Surface mount passive component shorted together and a die

Three dimensional inductor-capacitor apparatus and method of fabricating

LIU YU CHUN

Doweling jig kit

Pen vice

Anti-aging peptide, its composition and method of using the same

Hold down clamp for cutting and machining tables and jigs

Peptide for stimulating melanogenesis

UNITED MICROELECTRONICS CORP

P-type field effect transistor and method for fabricating the same

P-type field effect transistor having channel region with top portion and bottom portion

P-type field effect transistor and method for fabricating the same

LIU WEN-KUEI

Multistage lock apparatus

Multistage lock cylinder assembly

IND TECH RES INST

Graft polymer and composite material containing the same

Biomedical composition for skin care and/or maintenance and delaying and/or inhibiting skin aging and the use thereof

LIU WEN KUEI

Braking mechanism of a wheeled device

Transmission device for bicycle

PRO SUNFUN BIOTECH RES AND DEVELOPMENT CO LTD

Eye-care peptide, its composition and method of using the same

Peptide for promoting wound healing, its composition and method of using the same

(unassigned)

Soft stop-proof hook head of a measure tape

LIU CHAO-HSUAN

Combination lock with two dial plates