Droplets accuses Yahoo of using its software on its webspage.

Software company Droplets has sued Amazon, Apple, Google, Yahoo and YouTube for alleged infringement of its Web technology patents.

In its suit filed before the U.S. District Court for the Eastern District of Texas, Marshall Division, the Plano, Texas-based Droplets accused the five companies of infringing U.S. patent numbers 6,687,445 and 7,502,838 granted in February 2004 and March 2009, respectively.

The first patent covers its "system and method for delivering a graphical user interface of remote applications over a thin bandwidth connection." The second patent covers its "system and method for delivering remotely stored applications and information."

The Web applications and software are apparently used in the front pages of Yahoo, Amazon, and Apple's Web sites, Apple's movie trailer page, and Yahoo's Mail and Maps properties.

The company is seeking damages and future royalties for the use of the applications and software.

In 2006, Droplets also sued Adobe for infringing on patent 6,687,445 alleging that the digital media creation firm used it on its Flex product. Droplets and Adobe then settled in 2008 for an undisclosed amount.