Which manufacturer produced this fan blade?
GE Aviation

Clue 1. Parts designed at the Lynn MA plant have part numbers of the form xxxxTxxPxx, where x is a digit. 4922T12P01 fits that pattern. 

The gr.in is another clue. That refers to a weight that would be used in balancing the fan. GE uses units of gr.in. I'm fairly sure that Pratt uses oz.in, snecma uses gr.cm. I'm not sure what RR uses. 

But the definitive piece of information is 99207. That is a CAGE code. 99207 is registered to GE Aviation's lynn plant. I looked it up here http://www.govcagecodes.com/