Hollar Bartley Douglass: Display and shipping containers. Gould National Batteries, July 6, 1971: US3590988 (76 worldwide citation)

A display and shipping container having a transparent housing that forms locking engagement with a base member having an inner product engaging ring for holding the product securely within the container.

Hollar Bartley Douglass: Directional flow fluid filter. Gould, January 25, 1972: US3637078 (8 worldwide citation)

A fluid filter is disclosed incorporating a pleated filtering element disposed in a generally cylindrical housing. a helically shaped flow vane is disposed so as to spiral about the pleated element and to induce the flow of the fluid flowing through the filter to travel generally across the pleats r ...