DK

Donald W. Keefer

PL Plastibec: 8 patents #12 of 130Top 10%
Overall (All Time): #669,691 of 4,157,543Top 20%
8
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
5345628 Waterbed mattress with tethered wave motion-inhibiting inserts 1994-09-13
4879775 Reinforced rail assembly for waterbeds 1989-11-14
4771491 Reinforced wall soft side waterbed Isaac Fogel 1988-09-20
4715076 Waterbed motion reduction and hydraulic enhancement system Isaac Fogel 1987-12-29
4688284 Wave dampened waterbed Lawrence Wride 1987-08-25
4597120 Waterbed utilizing dual fluid-filled mattresses and having improved surface continuity Isaac Fogel 1986-07-01
4521929 Heated waterbed 1985-06-11
4506397 Waterbed construction Isaac Fogel 1985-03-26