Exclusive sales inverted umbrella.
Our reverse folding umbrella already has the protection by U.S utility patent.
We are looking US distributor and partner. Contact us!  

allsellumbrellas@gmail.com 
886+422418611#10 
Petet Liu
All Sell Creativity

All umbrella you can purchase from Amazon, of course have business price for sample.
Please refer this AMAZON logo link: 

The utility patent number is US 9,549,595 B1,
Also protection by U.S design patent.
The patent number is USD 797,437 S, US D813,523 S

Please refer that pdf document below., you can download it.
1.U.S utility patent:  US 9,549,595 B1,
2.U.S design patent: US D797,437 S
3.U.S design patent: US D813,523 S

Of Course we have patented of curved inverted umbrella.
We are origin inventor ,develop umbrella and make it real.

4. United states design patent US D838470S