Robert A. Null — 12 Patents at Hunter Douglas

Robert A. Null has been granted 12 US patents while listed as an inventor at Hunter Douglas. The first was granted in 1981 and the most recent in January 2007. Robert A. Null ranks #396,045 of 4,157,543 US inventors in our database (top 9.5%). Patent records list Robert A. Null in Littleton, CO, US.

Issued Patents All Time

Showing 1–12 of 12 patents

Patent #	Title	Co-Inventors	Date	Approx Value ⓘ
7168475	Shutter-type covering for architectural openings	Wendell B. Colson, James M. Anthony, Richard N. Anderson, Steven R. Haarer, Donald E. Fraser	2007-01-30
7114545	Magnetic catch for bottom rails of coverings for architectural openings	—	2006-10-03
6901988	Shutter-like covering and hardware for architectural opening	Wendell B. Colson, James M. Anthony, Richard N. Anderson, Steven R. Haarer, Donald E. Fraser	2005-06-07
6808002	Balanced tilt mechanism for a covering for an architectural opening	Wendell B. Colson, Marek Jarosinski, David Lynch, Bogdan R. Ulatowski	2004-10-26
5344474	Gas separation device	—	1994-09-06
5298884	Tamper detection circuit and method for use with wearable transmitter tag	Jack Arthur Gilmore, Donald A. Melton	1994-03-29	$565,000
5019056	Bowel care apparatus	Alan R. Lee, David P. Mead, Thomas Shilling, Ray Atchley	1991-05-28
D292310	Gas fractionator for drying compressed air	Lonnie C. Laughlin, Michael Goldberg, Peter T. Quinn	1987-10-13
4655100	Rolling element jackscrew	Gary L. Frederick	1987-04-07
4631073	Method and apparatus for theadsorptive fractionation of gases	Lonnie C. Laughlin, Michael Goldberg	1986-12-23
4559065	Twin tower gas fractionation apparatus	Lonnie C. Laughlin, Michael Goldberg	1985-12-17
4299313	Mobile luggage case handle assembly	—	1981-11-10

Robert A. Null — 12 Patents

Issued Patents All Time

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