Robert E. Hazard — 7 Patents at Polytop

Robert E. Hazard has been granted 7 US patents while listed as an inventor at Polytop. The first was granted in 1980 and the most recent in June 2004. Robert E. Hazard ranks #680,018 of 4,157,543 US inventors in our database (top 16.4%). Patent records list Robert E. Hazard in Fresno Street, RI, US.

Issued Patents All Time

Showing 1–7 of 7 patents

Patent #	Title	Co-Inventors	Date
6755327	Dispensing pump with deformable pump wall and positive shut-off	Frederick R. Handren	2004-06-29
5409146	Dispensing pump with positive shut-off	Frederick R. Handren	1995-04-25
4625898	Dispensing closure employing living hinge with cams to momentarily deform hinge and recesses to accept cams	—	1986-12-02
4377247	Dispensing closure employing living hinge	Woodrow S. Wilson	1983-03-22
4282991	Dispensing closure seals	—	1981-08-11
4220248	Closure with hinged lid and cam and spring elements holding lid open or closed	Woodrow S. Wilson	1980-09-02
4219138	Dispensing closure utilizing a sealing element supported by a washer spring	—	1980-08-26

Robert E. Hazard — 7 Patents

Issued Patents All Time

Patent Widget