Corporate Milestones
| February 1985 | Incorporated as Epson Portland Inc. |
| July 1985 | Groundbreaking for Phase I Building |
| July 1986 | Printer Assembly started |
| August 1986 | Circuit Board Assembly started |
| August 1987 | Groundbreaking for Phase II Building |
| December 1987 | 9–Pin Dot Head manufacture started |
| July 1988 | Plastic injection molding started |
| October 1989 | One millionth printer built |
| July 1990 | Epson Research Center (Epson Imaging Technology Center) acquired |
| August 1991 | 24–Pin Dot Head production started |
| February 1993 | ISO 9002 certified |
| October 1994 | Stylus Color Ink Jet Printer production started |
| August 1995 | Groundbreaking for Phase III building |
| September 1996 | EPI celebrates 10–year anniversary |
| June 1997 | Ink Jet Head operations started |
| June 1998 | ISO 14001 certified |
| August 1998 | 10 millionth printer built |
| February 1999 | Ink Cartridge production started |
| February 2000 | Optical Engine Repair department started |
| August 2001 | Printer Assembly discontinued |
| January 2002 | First Gemini Portrait Printing System Shipped |
| December 2002 | Factory of the Year in Seiko Epson Group |
| June 2003 | 100 Million Ink Cartridges produced |
| June 2004 | HAVII Ink Cartridge production started |
| February 2005 | 20th Anniversary of incorporation in Oregon |
| December 2005 | 200 million ink cartridges shipped |
| April 2006 | HAV1 ink cartridge production started |
| July 2006 | EPI Celebrates its 20th Anniversary |