Possible Clues:

• Inventor's lack of pretentiousness in retirement
• Thomas ......, famous American inventor
• A famous man, but there's no side about him
• Great inventor
• American genius for making end of game uplifting
• Team up, working for inventor
• My boss is working to become an inventor
• Inventor Edgar with one member of his family
• His birthday is National Inventors' Day
• The 'Ed' of Con Ed