Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Single plane window or door structure

Single plane window or door structure

US Patent 4570381 · Granted Feb 18, 1986

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Coil spring counterbalance hardware assembly and connection method therefor1992
Sliding center-pivoted window1992
Vertically slidable window unit1992
Self-contained heavy duty constant force sliding sash counterbalance assembly1990
Method for fabricating a compound portal frame extrusion profile1987
Tilt window balance shoe assembly1987
Window vent1986
Insulated multiple component single plane building structure portal closure1984
Insulated multiple component single plane building structure portal closure1982
Window latch1982
Window assembly having removable sash1981