R is the abbreviation of REGISTER, which means registered trademark when used in trademarks; TM is the abbreviation of TRADEMARK. American trademarks are usually marked with TM, which does not necessarily refer to registered trademarks. The regulations for the implementation of China's Trademark Law stipulate that the use of registered trademarks can indicate "registered trademarks" or registration marks on commodities, commodity packages, manuals or other attachments.

George Safford Parker, the founder of Parker Pen, was born in Shulsburg, Wisconsin, USA in 1863. George Parker has worked in Valentine's School since 188. In order to supplement his poor salary, George Parker became a middleman, mainly helping John Holland's pen company sell pens to his students.