0000950123-04-002235 8-K 2 20040224 7 9 20040224 REGENERON PHARMACEUTICALS INC 0000872589 2834 133444607 NY 1231 8-K 34 000-19034 04623471 777 OLD SAW MILL RIVER RD TARRYTOWN NY 10591-6707 9143477000 8-K 1 y94550e8vk.htm REGENERON PHARMACEUTICALS, INC. EX-99.A 3 y94550exv99wa.htm PRESS RELEASE