Union Denshi Kougyou
From Game Developer Research Institute
A subsidiary of Konami that manufactured arcade games (ユニオン電子工業株式会社).  Probably didn't develop anything.
Research Methods: Online resources
- The End (Konami/Stern)
- Kamikaze / Astro Invader (Leijac/Stern)
- "Union Denshi Kogyo Company" is listed as the copyright claimant and author on US copyright registrations pertaining to the preceding games.
- Space Ship (Leijac)