▁two ▁step children : ▁Cl iff ord ▁Dun lap ▁and ▁Mary ▁Ga ither . ▁ ▁He ▁had ▁two ▁sons ▁with ▁his ▁first ▁wife ▁In ge ▁Sp ors ▁H older er , ▁to ▁whom ▁he ▁was ▁married ▁for ▁ 5 0 ▁years : ▁Thomas ▁and ▁Michael . ▁ ▁H older er ▁had ▁four ▁grand children ▁and ▁three ▁great - grand children ▁at ▁the ▁time ▁of ▁his ▁death . ▁ ▁He ▁was ▁the ▁last ▁known ▁surv iving ▁member ▁of ▁the ▁original ▁Operation ▁Pap erc lip ▁team . ▁ ▁Georg ▁von ▁T iesen hausen , ▁who ▁em igr ated ▁later , ▁was ▁still ▁alive . ▁Upon ▁his ▁death , ▁Buck ab ee ▁described ▁H older er ▁as ▁" a ▁very ▁tal ented ▁man , ▁not ▁only ▁an ▁aer ob all istics ▁expert ▁but ▁very ▁accomplished ▁in ▁design ▁and ▁fabric ation " ▁ ▁H older er ▁received ▁ 1 9 ▁pat ents ▁during ▁his ▁life . ▁ ▁He ▁was ▁induct ed ▁into ▁the ▁Space ▁Camp ▁Hall ▁of ▁Fame ▁in ▁ 2 0 0 8 . ▁ ▁References ▁▁ ▁Category : 1 9 1 9 ▁birth s ▁Category : 2 0 1 5 ▁death s ▁Category : American ▁a eros pace ▁engine ers ▁Category : E ar ly ▁space fl ight ▁scient ists ▁Category : G erman ▁a eros pace ▁engine ers ▁Category : G erman ▁em igr ants ▁to ▁the ▁United ▁States ▁Category : G erman ▁invent ors ▁Category : G erman ▁people ▁of ▁World ▁War ▁II ▁Category : G erman ▁ro cket ▁scient ists ▁Category :