Rambus, which had counted on a surge in royalties from the Pentium 4 launch, is now going after other royalties on both SDRAM and DDR.

FORBES: Rambus Patent Army Marches On

Should RDRAM never gain the wide acceptance the company had hoped for, Rambus' patent claims are an attempt to ensure the company gets a piece of the action through royalty payments, no matter what type of memory takes hold, whether SDRAM, DDR or its preferred RDRAM.

FORBES: Rambus Patent Army Marches On

Fearing a botched launch for Pentium 4 because of insufficient supplies of RDRAM, Intel has conceded in recent weeks that it will use other memory technologies like conventional SDRAM and possibly DDR as a memory option with Pentium 4.

FORBES: Rambus Patent Army Marches On

Rambus originally sued Infineon claiming patent infringement on two kinds of PC memory: SDRAM, which is commonly used, and DDR, a newly developed type of memory.

FORBES: Focus On The Forbes 500s

Rambus claims Infineon is violating its patents on two kinds of computer memory, known as synchronous dynamic random access memory (SDRAM), and Double-Data Rate DRAM (DDR).

FORBES: Rambus Patent Army Marches On