Patents[edit]

U.S. Patent 3,120,363 — Flying apparatus — G.E. Hagen

T. T. Brown was granted a number of patents on his discovery:

• GB300311 — A method of and an apparatus or machine for producing force or motion (accepted 1928-11-15)

• U.S. Patent 1,974,483 — Electrostatic motor (1934-09-25)

• U.S. Patent 2,949,550 — Electrokinetic apparatus (1960-08-16)

• U.S. Patent 3,018,394 — Electrokinetic transducer (1962-01-23)

• U.S. Patent 3,022,430 — Electrokinetic generator (1962-02-20)

• U.S. Patent 3,187,206 — Electrokinetic apparatus (1965-06-01)

• U.S. Patent 3,196,296 — Electric generator (1965-07-20)

Historically, numerous patents have been granted for various applications of the effect, from electrostatic dust precipitation, to air ionizers, and also for flight. A particularly notable patent — U.S. Patent 3,120,363 — was granted to G.E. Hagen in 1964, for apparatus more or less identical to the later so-called 'lifter' devices.