Can anyone clear up wither or not any of the US Mold Mfg's, are making and selling production molds that have been trademarked and or have patents? Furthermore how does one identify if such molds may or may not infringe upon these patents/trademarks... It's my understanding that obtaining patents as well as trademarking such products takes and awful lot of time and money, yet numerous folks have been sent cease and desist letters. Is this in an effort to scare one from actually selling a similar product that has not in fact been patented, or do they really have a patent. Which goes back to the initial question, how does one identify wither they have a patent or not? ( Not mentioning Mold Specifics) and I'm not talking about the oversea manufactures.