WEST LAFAYETTE, Ind. (AP) - Purdue University bioengineer professor Leslie Geddes, who was credited with more than 30 patents for biomedical devices, has died. He was 88.

Purdue says that Geddes died Sunday. He retired as a distinguished professor in 1991, but continued the teaching and research work that resulted in him receiving the National Medal of Technology during a 2007 White House ceremony from President George W. Bush.

Geddes had said the invention of which he was proudest was a material derived from hogs' small intestines that promotes new tissue growth. It has been turned into products used in more than 200,000 patients for soft tissue repair and orthopedics.

Purdue says that the technologies developed by Geddes have generated more than $15 million in royalties for the university.