Autori
- Hadley John (1 scheda)
- Haemonetics (1 scheda)
- HAFF, Germany (1 scheda)
- Hähnel (1 scheda)
- Haid & Neu - Karlsruhe (1 scheda)
- Haldane, John Scott (2 schede)
- HaldenWanger (1 scheda)
- Haldenwanger Berlin (3 schede)
- Halford Frank (3 schede)
- Hall, Frank Haven (1 scheda)
- Hall Thomas (1 scheda)
- Hamann (1 scheda)
- Hamann Christel (3 schede)
- Hameg Instruments (1 scheda)
- Hamilton (1 scheda)
- Hammarlund (1 scheda)
- Hammond James Bartlett (6 schede)
- Hammond Typewriter Company (6 schede)
- Hans W. Egli (2 schede)
- Hans W. Egli - Zurich (1 scheda)
- Harris DeWitt C. (1 scheda)
- Harris Intertype Corporation - USA (2 schede)
- Harrison John (1 scheda)
- Harry A. Smith Typewriter Company (1 scheda)
- Hartford Typewriter Company (1 scheda)
- Hartmann & Braun (7 schede)
- Hartmann & Braun AG (2 schede)
- Hartmann e Braun (2 schede)
- Hartmann Spa, Germany (1 scheda)
- Hartnack Edmund (2 schede)
- Hartnack E. & Prazmowsky A. (2 schede)
- Hase Johann Matthias (1 scheda)
- Hasler (5 schede)
- Hasler, Berne (Suisse) (1 scheda)
- Hass Jacob Bernard (3 schede)
- Hauptner, Hans (1 scheda)
- Hawksley (1 scheda)
- Hawksley England (1 scheda)
- Hawksley, England (1 scheda)
- H. Bellieni (1 scheda)
- HCT - Hoechst CeramTec AG, Germany (1 scheda)
- Heathkit (1 scheda)
- Heathkit Company Inc. (1 scheda)
- Hebdomas S. A. (1 scheda)
- Hebert Sidney (1 scheda)
- Hefner-Alteneck Friedrich von (5 schede)
- Heine (2 schede)
- Heine Optotechnik, Germany (1 scheda)
- Heinrich D. Ruhmkorff (1 scheda)
- Heintze & Blanckertz (2 schede)
- Heljestrand (1 scheda)
- Hellige (1 scheda)
- Hellige U.S.A. (1 scheda)
- Helmets Ltd Cromwell Firepro (1 scheda)
- Helvetia (1 scheda)
- Henke Sass Wolf (1 scheda)
- Henke Sass Wolf, Germany (2 schede)
- Heraeus (3 schede)
- Herbiniaux Georges M. (1 scheda)
- Hertel & Reuss - Kassel (1 scheda)
- Herzstark, Curt (1 scheda)
- Hess Edward B. (1 scheda)
- Hewlett Packard (1 scheda)
- Hewlett-Packard (4 schede)
- Heyer - Schulte (1 scheda)
- HG (1 scheda)
- Hioki E. E. Corporation (1 scheda)
- Hirschowitz, Basil Isaac (1 scheda)
- Hitachi Ltd. (1 scheda)
- Hlubucek C. (1 scheda)
- Hochenadel Adalberto (1 scheda)
- Hochenadl Andreas (1 scheda)
- Hoffman Laboratories Inc. (1 scheda)
- Hoffmann Camera (1 scheda)
- Hollerith H. Herman (3 schede)
- Holmes Oliver Wendell Sr (1 scheda)
- Holset Engineering Co. Ltd. (1 scheda)
- Homophon Company GmbH (1 scheda)
- Honeywell Inc. (1 scheda)
- Hopkins (1 scheda)
- Horner William George (1 scheda)
- Horn Thomas (1 scheda)
- Houghtons Ltd (2 schede)
- Houston Fearless 76 Inc. (1 scheda)
- Howard (1 scheda)
- Howe Sound Company (1 scheda)
- Hoya (4 schede)
- Hughes David Edward (3 schede)
- Hughes, William (1 scheda)
- Hugo Meyer & Co. (2 schede)
- Hysl (1 scheda)
- H. Zepf (1 scheda)