Hu Guoqing's patent

1. multistage telescopic cylinder, China patent number: ZL03 103073.4 (first inventor);

2. Full-automatic punching machine, the invention patent number of People's Republic of China (PRC) is ZL 00 130749.5 (the first inventor);

3. Electromagnetic explosion-proof valve, patent number of China: ZL 99 104634. x； ; (the first inventor);

4. Explosion-proof cut-off valve, patent number of China: ZL 94239863. X (the first inventor);

5. Full-automatic freezer, patent number of China: ZL2007 100090 15.4 (first inventor).

6. Fully automatic horizontal and vertical paper cutter, patent number of China: ZL2007 10008659. 1 (the first inventor).