The Higgins Boat Co. in New Orleans was famous for making LCVPs during WW2, and the phrase "Higgins boat" has become synonymous with LCVPs regardless if if they were made by the Higgins Boat Co. or not, and also regardless of if they were made after the war when the Higgins Boat Co. was no longer in business.
This is similar to how many of us refer to all cola drinks as "coke" regardless of if it was made by Coca Cola or not.
Here is a photo of one of LST 325's LCVP "Higgins" boats on a test run in the Ohio River after some repairs. The photo was taken from the deck of LST 325.
From left to right: Sam Richey, Jim Grayson, Don Hardesty, Marvin Oeth, and Larry Hahn