Alle Firmen mit dem Anfangsbuchstaben I
- Ing. Lang Heinz Valentin
- Ing. Lang Renate
- Ing. Lang Roman
- Ing. Lang Wolfgang
- Ing. Langegger Martin
- Ing. Langerreiter Michael
- Ing. Langmann Michael
- Ing. Langmann Robert
- Ing. Langsteiner Andreas
- Ing. Lanz Richard Herbert
- Ing. Lanzerstorfer Manuel
- Ing. Larcher Ralf
- Ing. Lasser Thomas Richard
- Ing. Lassy Markus Walter
- Ing. Laudert Philipp Emanuel
- Ing. Lauko Michael Theo
- Ing. Lauritsch Erich R
- Ing. Lazar Friedrich Hubert
- Ing. Leb Stefan
- Ing. Lebeda Horst
- Ing. Leber Kurt
- Ing. Leber Martin
- Ing. Leberbauer David Martin
- Ing. Leberer Martin
- Ing. Lebesmühlbacher Stefan
- Ing. Lechleitner Herbert
- Ing. Lechner Andreas
- Ing. Lechner Christian Walter
- Ing. Lechner Jürgen
- Ing. Lechnitz Alfred
- Ing. Lechthaler Thomas
- Ing. Lederhilger Günther Ernst
- Ing. Leeb Franz
- Ing. Leeb Franz Christian
- Ing. Lef Helmut
- Ing. Lehmann Emmerich
- Ing. Lehofer Erich Franz
- Ing. Leibetseder Andreas
- Ing. Leibetseder Simon
- Ing. Leichter Johannes Christoph
- Ing. Leinweber Walter
- Ing. Leisch Herbert
- Ing. Leitgeb Denise
- Ing. Leitgöb Wohnen GmbH Franz
- Ing. Leithner Johannes
- Ing. Leitner Alexander
- Ing. Leitner Christoph
- Ing. Leitner Josef
- Ing. Leitner Markus
- Ing. Leitner Wolfgang
- Ing. Lendl Peter Michael
- Ing. Lengauer Dominik Rudolf
- Ing. Lengauer Karl
- Ing. Lenz Herbert
- Ing. Lenz Patrick
- Ing. Lenz Stefan Christopher
- Ing. Lenz Wolfgang
- Ing. Lenzbauer Dominik
- Ing. Lenzenweger-Kraml Andreas
- Ing. Leonhardsberger Klaus
- Ing. Leopold Past Nachfolger Ing. Erich Past, Kraftfahrzeug- reparaturwerkstätten
- Ing. Lercher Michael
- Ing. Lercher Wolfgang
- Ing. Lerchner Michael
- Ing. Lessiak Alois
- Ing. Lessiak Andreas
- Ing. Lessig Günter
- Ing. Lettner Friedrich
- Ing. Lettner Josef
- Ing. Lexen Erika
- Ing. Lichtenberg Alfred Emmerich Maria
- Ing. Lichtenegger Hans Peter
- Ing. Lichtenegger Silvia Dagmar
- Ing. Lieb Robert
- Ing. Liebert Thomas
- Ing. Liegl Andreas
- Ing. Liendl Edmund
- Ing. Limberger Dietmar
- Ing. Lindhorst Ingo
- Ing. Lindinger Christian