Research Development Systems, Inc.

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Records under this name other than patents Research Development Systems, Inc. holds now: patents now held by others, patents whose terms have ended, and its applications, pending or abandoned.

Showing 1 to 5 of 5 · Back to Research Development Systems, Inc.

Patent	Title	Status	Expires	Confidence
US 4,019,508	Wearable, self-contained fully mobile personal breathing apparatus for surgeons and operating room personnel Term ended Term ended no later than Apr 26, 1997 · Low confidence	Term ended	Term ended no later than Apr 26, 1997	Low confidence
US 4,152,635	Battery charger Term ended Term ended no later than May 1, 1999 · Low confidence	Term ended	Term ended no later than May 1, 1999	Low confidence
US 4,279,188	Acoustic coupling free electric drum Term ended Term ended no later than Jul 21, 2001 · Low confidence	Term ended	Term ended no later than Jul 21, 2001	Low confidence
US 4,282,793	Composite drum head Term ended Term ended no later than Aug 11, 2001 · Low confidence	Term ended	Term ended no later than Aug 11, 2001	Low confidence
US 4,765,907	Wearable, continuously internally operable and externally regenerable dialysis device Term ended Term ended no later than Aug 23, 2008 · Low confidence	Term ended	Term ended no later than Aug 23, 2008	Low confidence