Alle Firmen mit dem Anfangsbuchstaben I
- Ing. Radler Heinz-Peter
- Ing. Raimund Fuchs e.U.
- Ing. Raimund Seidl Gartengestaltung
- Ing. Rainer Christian
- Ing. Rainer Hantsch
- Ing. Rainer Heimo
- Ing. Rainer Knasar Wirtschaftsinformatik e.U.
- Ing. Rainer Ludwig Volgger
- Ing. Rainer Philippe
- Ing. Raith Alfred
- Ing. Ralf Moschitz
- Ing. Ram Thomas
- Ing. Ramharter Martin
- Ing. Rampitsch Marko Franz
- Ing. Ramprecht Christian
- Ing. Ramprecht Florian
- Ing. Ramsauer Thomas
- Ing. Ramsbacher Thomas
- Ing. Ranstl Christian
- Ing. Ras Robert
- Ing. Raschbach Werner Wolfgang
- Ing. Raschun Philipp Raimund
- Ing. Rasinger Harald Walter Simon
- Ing. Ratheiser Robert
- Ing. Rathmanner Walter e.U.
- Ing. Ratka Michael Christian
- Ing. Rattenberger Rudolf Michael
- Ing. Rauch Elisabeth Chaclien
- Ing. Rauch Peter
- Ing. Rauch Peter
- Ing. Rausch Katrin
- Ing. Rauscher Michael Josef
- Ing. Rauter Hans
- Ing. Ray Mario
- Ing. Rebenek Hermann
- Ing. Rechberger Michael
- Ing. Rechberger Verena Christine
- Ing. Redl Helmut
- Ing. Rehrl Josef
- Ing. Reichel Dieter
- Ing. Reichel Peter
- Ing. Reichenauer Michael
- Ing. Reichenauer Rainer
- Ing. Reicher Josef
- Ing. Reichtomann Robert
- Ing. Reider Florian
- Ing. Reihs Christian
- Ing. Reimer Horst
- Ing. Reinbacher Michael
- Ing. Reiner Barbara Michaela
- Ing. Reiner Tobias
- Ing. Reinhard Bauer und Ilse Bauer Gesellschaft bürgerlichen Rechts
- Ing. Reinhard Fohringer | INFINA Partner
- Ing. Reinhard Hanns Sicherheitstechnik e.U.
- Ing. Reinhard Leibetseder Bauelemente GmbH
- Ing. Reinhard Ruiner KG
- Ing. Reinhard Schreckeneder
- Ing. Reinhold Dankl Gesellschaft m.b.H.
- Ing. Reinhold Niescher | Infina Partner
- Ing. Reinisch Rene Peter
- Ing. Reinprecht Franz
- Ing. Reinprecht OG
- Ing. Reischl GmbH - Gartengestaltung seit 1967
- Ing. Reischütz Michael
- Ing. Reisenthaler Christian
- Ing. Reissner Christian
- Ing. Reiter Andreas
- Ing. Reiter Carine Elisabeth
- Ing. Reiter Christian
- Ing. Reiter Harald
- Ing. Reiter Helmut
- Ing. Reiter Karl Heinz
- Ing. Reiter Liane
- Ing. Reiter Sonja
- Ing. Reiterer Leopold
- Ing. Rene MARKL G.m.b.H.
- Ing. Renner Hubert e.U.
- Ing. Resavac Ivan
- Ing. Resch Christian Koloman
- Ing. Resch Stefan