Inventor

ARMSTRONG LAURENCE P

US7 patents

⚠️ This page may combine multiple inventors who share the name “ARMSTRONG LAURENCE P”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

NICHOLS HOMESHIELD INC

2 patents

US4850078AJul 25, 1989

Adjustable roller assembly for sliding doors

NICHOLS HOMESHIELD INC25 citations90

US4843775AJul 4, 1989

Square butt door frame and method of assembly

NICHOLS HOMESHIELD INC14 citations67

FRESHAIR SCREEN TECHNOLOGY LLC

2 patents

US7735540B2Jun 15, 2010

Longitudinal frame member and spline

FRESHAIR SCREEN TECHNOLOGY LLC16 citations80

US7316758B2Jan 8, 2008

Method of manufacturing screen assembly

FRESHAIR SCREEN TECHNOLOGY LLC7 citations70

QUANEX CORP

1 patent

US5845363ADec 8, 1998

Adjustable roller assembly

QUANEX CORP77 citations91

ARMSTRONG LAURENCE P

1 patent

US8156994B2Apr 17, 2012

Longitudinal frame member and spline

ARMSTRONG LAURENCE P19 citations87

AMSCO ENGINEERED PRODUCTS

1 patent

US6643988B1Nov 11, 2003

Frame assembly with a flush corner appearance

AMSCO ENGINEERED PRODUCTS28 citations82