Knock / Knock

Paul Soldner
Source: Craftsmen Builder  

Wood door by Eric Hoglund

Kitty door

Svetozar Radakovich door, 1966 
(Greg Strangman collection)
Source: San Diego's Craft Revolution: From Post War to California Design 


Svetozar Radakovich, in collaboration with Carl Ekstrom Fiberglass Doors
California Design 10

John Kapel door
Source: Handcrafted Modern, Leslie Williamson 

C. Fletcher Coddington

Studio Door by Malcolm Leland
Source: Studio 111


Kay Whitcomb Enamel Doors
Source: Reform Gallery

James Hubbell hardware

Mabel Hutchinson doors
Source: Reform Gallery

Dieter Muller-Stach

Claire Falkenstein Gates, Venice, Italy
Eames and Walsh Door, Dean House
Source: Architectural Ruminations