Cheng-Chuan Lu

UN Unknown: 1 patents #29,356 of 83,584Top 40%

📍 Danei, TW: #231 of 1,188 inventorsTop 20%

Overall (All Time): #1,523,127 of 4,157,543Top 40%

Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #	Title	Co-Inventors	Date
9140292	Anti-loose screw and a die device for forming same	—	2015-09-22
6293745	Screw with an improved head structure and punch for forming same	—	2001-09-25
5674037	Screw having an improved head structure	—	1997-10-07