Dishes Invented In Maine Restaurants?

I'm trying to find every restaurant/hotel/eatery that invented or first served a specific regional dish in Maine. Not looking for drinks. So far I know of:

1.Amato's- Italian Sandwich

2.Boone's Fish House & Oyster Room- Baked Stuffed Lobster

3.Bayley's Lobster Pound- Maine Style Lobster Roll

4.Seavey's Sweets- Needhams

5.Labadie's Bakery- Whoopie Pie (disputed)

Know any others?