Proto Manufacturing, Inc. Proto Manufacturing, Inc. Search | Advanced Search | New Members | Coupons and Discounts | All Categories Industrial & Manufacturing >> Manufacturing >> Sheet Metal Fabrication Proto Manufacturing, Inc. 5959 N Freya StSpokane, WA 99217 | View on Google Maps (509) 535-9683 Member Since: 1994 Send a message to: Proto Manufacturing, Inc. Your Name: Your Email: Subject: Message: (Date: 4/26/2024)