1
Irwin R Abell: Glazing fastener for mounting either rigid or flexible storm windows. Hartwig Hartoglass, Klarquist Sparkman Campbell Leigh & Whinston, April 10, 1984: US04441290 (25 worldwide citation)

A glazing fastener for mounting either rigid or flexible storm windows employs two elongated plastic strips: a channel strip having a narrow lengthwise channel, and a glazing strip having a narrow lengthwise insert flange for insertion into the channel. Walls of the channel and sides of the insert f ...


2
Irwin R Abell: Double-wall greenhouse with flexible film walls. Hartwig Hartoglass, Klarquist Sparkman Campbell Leigh Whinston & Dellett, June 23, 1981: US04274234 (19 worldwide citation)

A double-wall greenhouse with flexible plastic walls is disclosed. The side walls and roof of the greenhouse form an integral tunnel-like shell about an unobstructed internal space. Opposite ends of the shell are closed by end panels. The inner and outer surfaces of the shell are formed by parallel ...


3
Irwin R Abell: Glazing fastener for mounting either rigid or flexible storm windows. Hartwig Hartoglass, Klarquist Sparkman Campbell Leigh Whinston & Dellett, March 23, 1982: US04320609 (12 worldwide citation)

A glazing fastener for mounting either rigid or flexible storm windows employs two elongated plastic strips: a channel strip having a narrow lengthwise channel, and a glazing strip having a narrow lengthwise insert flange for insertion into the channel. Walls of the channel and sides of the insert f ...


4
Abell Irwin R: Fenetre et porte isolantes, Insulating window and door construction. Hartwig Hartoglass, SMART & BIGGAR, December 15, 1981: CA1114238

INSULATING WINDOW AND DOOR CONSTRUCTION Abstract A window construction includes longitudinallychanneled framing strips of right angular cross sectionattached to the four faces of a window casing or to a stormdoor window opening. Boundary edge portions of a paneclosing the window opening are attached ...