Inventor
EVANS ROBERT H
4 patents
⚠️ This page may combine multiple inventors who share the name “EVANS ROBERT H”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
(unassigned)
2 patentsUS5394789AMar 7, 1995
Manually operable device for metering air through a valve system for drawing into, retaining and evacuating material from a chamber
30 citations89
US5485779AJan 23, 1996
Device for selectively pressurizing or evacuating a chamber with an oscillating air source by metering air through a valve system and a device for drawing into, retaining and evacuating material from a chamber
5 citations59