Minden businessman and inventor Don Bently left his mark in the international world of technology, but it was his loyal and longtime employees who eulogized him Thursday on his 88th birthday.Some 500 people filled the St. Gall Pastoral Center for a 21⁄2-hour memorial service for Bently who died Oct. 1 at his Minden residence.The memorial featured speakers from all aspects of Bently's long life, including his son Christopher and Dr. John Lenzcowski, founder and president of the Institute of World Politics.For many in the audience, the memorial was a reunion with longtime colleagues who fondly remembered their days at Bently …