American Antigravity's latest

Boeing Does Gravity-Control - concise overview of the current trends, theoretical foundations, and likely successful applications

A Brief History of HFGWs - history of Gravitational Waves themselves predated Einstein’s 1916 paper

Gravifugal Force - could a rapidly rotating ring create lift?

High-Frequency Gravitational Waves - work toward successful generation

Experimental Indications of Electro-Gravity - influence of space dependant electric fields on the weight of test particles