Inovio Pharmaceuticals Inc., of Plymouth Meeting, Pa., said it has entered an agreement to acquire all the assets of Bioject Medical Technologies Inc., of Tigard, Ore. Inovio said it plans to pay $5.5 million in cash and stock for the assets, which include needle-free jet injection technology, devices and intellectual property. Inovio said it plans to facilitate preventive immunizations with its DNA vaccines using Bioject's jet injection technology combined with Inovio's new needle-free, skin-surface EP (electroporation) technology.