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We show that strictly local observables with arbitrarily small support inspace-time exist in covariant free open bosonic string field theory. The mainingredient of the proof is a modified version of the well known DDF operators,which we rigourously define. This result allows in principle the definition ofa net of local observable algebras and should be considered as a first steptowards the application of algebraic quantum field theory to this case

Local aspects of free open bosonic string field theory