YF

Yee-Chang Feng

Overall (All Time): #419,042 of 4,157,543Top 15%
12
Patents All Time

Issued Patents All Time

Showing 1–12 of 12 patents

Patent #TitleCo-InventorsDate
9255493 Clean energy generation system Po-Lo Feng 2016-02-09
5517885 Screwdriver with slidably stored tool head module 1996-05-21
5499562 Exchangeable type screwdriver with work-head storage module(s) 1996-03-19
D340173 Integrated circuit extraction tool 1993-10-12
D331527 Integrated circuit extraction tool 1992-12-08
D325501 Integrated circuit insertion tool 1992-04-21
D323936 Tool box 1992-02-18
5084982 Combined vernier gauge and protractor 1992-02-04
5083664 Multi-storied tool box 1992-01-28
5029707 Tool box 1991-07-09
D310468 Integrated circuit insertion tool 1990-09-11
4879806 Tool for dip-type ICs 1989-11-14