1
Dean Jesse W: Racket with adjustable handle. Hilbert Philip G, September 3, 1974: US3833219 (30 worldwide citation)

A racket for tennis, squash, badminton or similar sports, which includes a handle of adjustable length; a handle grip of adjustable perimetric size; means for adjusting the weight of the handle and/or the head portion of the racket, wherein the several adjustable features may be coordinated to suit ...


2
Gunter Adam: Racket with adjustable handle. PUMA Sportschuhfabriken Rudolf Dassler KG, Sixbey Friedman & Leedom, October 8, 1985: US04545584 (13 worldwide citation)

A tennis racket having a hand-grip shell that can be moved longitudinally on the frame shaft. The hand-grip shell is formed of two half-shells made of a hard material which, by means of an elastic winding strip, a tube or several tube sections are pressed together so that the thus formed grip is hel ...