The Apple vs. Samsung trial revealed that the offer was made in October of 2010.
"Samsung chose to embrace and imitate Apple's iPhone archetype," Apple said in an Oct. 5, 2010 presentation to Samsung. "Apple would have preferred that Samsung request a license to do this in advance. Because Samsung is a strategic supplier to Apple, we are prepared to offer a royalty-bearing license for this category of device."
Notably, Apple was willing to reduce this amount by 20% if Samsung consented to cross licensing.
The October 2010 presentation followed an earlier one in August where Apple expressed concerns that its patents had been infringed upon.
"Apple has identified dozens of examples where Android is using or encouraging others to use Apple patented technology," Apple said in the August 2010 presentation headlined "Samsung copying iPhone."
"Many more Apple patents are relevant to the Android platform," Apple said pointing to patents it believed were infringed on. "Apple has not authorized the use of any of these patents."
You can check out the full October 2010 presentation below.