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DE2838803A1
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Interchangeable picture frame construction - consists of mitred profiled strips with groove underneath for fixtures
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Photograph and negative storage system - uses envelopes with two compartments and placed in rectangular box with lift off lid
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Drawing board with grooves - grooves have inclined surfaces to allow easy removal of square rule
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DE2348797A1
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Line drawing template with flat body - has arrowhead-shaped opening for pencil tip
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US3866326A
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Drawing board
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Drafting table
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Drawing apparatus
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DE960880C
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Drawing board with clamping guide rail
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DE712134C
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Drawing and writing pad with bow mounting rails recessed opposite the drawing or writing surface
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DE377265C
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Tear bar with clip-on, adjustable and movable angle rails
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DE561570C
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Pull spring filling device
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DE371340C
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Clamping device for exchangeable and reversible character blocks
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Drawing rail with line guide for standing drawing boards
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