There are only 9 patents for Twitter, which invented the "drop-refresh"!

There is also the issue of patent scarcity in addition to the profitability of Twitter, which will soon be listed. According to Bloomberg, Twitter currently has 9 patents in the US. In contrast, Facebook had 774 patents before its IPO in May 2012. Not to mention the number of patents Google has, Google's acquisition of Motorola Mobility has won the latter 17,000 patents. Twitter has too few patents in hand, which could put a risk on their future. The reason for this is that Twitter introduced the "Inventor Patent Agreement" (Innovator's patent agreement), which was launched for two purposes: Twitter wants to leave the control of patents to engineers and designers who invent patents. and second, they want to use this to show that their patents are for defensive purposes only, because if Twitter is to use a patent to sue someone, it has to go through the inventor's permission. Twitter's introduction of the inventors ' patent agreement is rare in the industry. In general, engineers and designers will sign an agreement with the company "irrevocably handing out patents related to employee work", which means that the company will control the patent of the employee's invention and be available at any time according to the company's situation. And the agreement introduced by Twitter is just the opposite. The aim of Twitter is clearly to keep good employees, encourage innovation and reduce malicious patent lawsuits. Twitter did not launch the inventors ' patent agreement until 2012, but the deal is valid for employees ' past and present patent applications. While Twitter's "inventor patent agreement" for inventors, leaving the risk to investors, looks good, but it also leaves a lot of trouble for themselves. If a patented employee leaves Twitter, it means the company has lost the patent altogether. The "patent-free" technology company is on the market, and investors have to face the new problem. "Dropdown" patent for Twitter employees