File Extension INVENTOR File Format Open Inventor File Translator How To [SGI] INVENTOR stands for Open Inventor File Translator How To [SGI]. This was last updated in March 2012 By Margaret Rouse Browse File Extensions Alphabetically: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # Ask a Question. Find an Answer. Ask your peers a question about this file extension. Ask a Question What is CRDOWNLOAD file and how to open? Open a new email dialog using API Advice to Product Teams - Think "API First"