jarrod on 27 February 2010
The formal announcement and reveal of N64's controller came in late 1995 at Nintendo's Shoshinkai exhibition and well predate public unveilings of both the PS Dual Analog pad (which predated the DualShock) and Saturn 3D NiGHTS pad. The analog stick's design was supposedly finalized in mid 1994, when Super Mario 64 started formal R&D.
It's generally seen that both Sega and Sony's new controllers were a direct response to the N64 controller, which wowed the press who played Mario 64 in 1995.
As for actual releases...
Nintendo 64 Pad: June 23 1996
NiGHTS 3D Pad: July 5 1996
Dual Analog Pad: April 25 1997
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