Did you find Louis's obituary? If not, contact the Tulare County Library, tularecountylibrary.org/obituaryrequests.html . They charge a reasonable fee.
The 1940 U. S. California Census has been released and will be indexed in a couple of months. That should provide you more information about if he was married then and where he was living.
Do you think he married in Tulare Co.? If yes, you can contact the Tulare County Clerk-Recorder, co.tulare.ca.us/government/clerk_Recorder/ and purchase a copy of his marriage license. Successful Searching!