Ortofon Manufacturing A/s

Calculating rank

USPTO Granted Patents = 7

Forward Citations = 21

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7 inventors (with patents filed for the assignee):

Hisayoshi Nakatsuka (3 out of 3 patents)

Robert Gudmandsen (3 out of 3 patents)

Bjarne S Hansen (2 out of 2 patents)

4. Flemming Tullin (1 out of 2 patents)

5. Knud H Andersen (1 out of 1 patent)

6. Jan Larsen (1 out of 1 patent)

7. Per Winfeld (1 out of 1 patent)

7 patents: Sort by Forward Citations

1. 4884262 - Magnetic system for a stereo pick-up with a movable coil (1989-11-28),

2. 4478475 - Method and plug for securing a connecting wire to a tubular pin (1984-10-23),

3. 4310917 - Pick-up (1982-01-12),

4. 4237349 - Compact moving-coil pickup of low weight and high quality (1980-12-02),

5. 4220341 - Pickup (1980-09-02),

6. 4145582 - Moving coil pickup having a substantially square magnetic armature (1979-03-20),

7. 4138122 - Pickup (1979-02-06),

Company Overview

Ortofon Manufacturing A/S is a Danish company specializing in the design and manufacturing of high-end audio equipment, specifically cartridges and needles for record players. With a history dating back to 1918, Ortofon has earned a reputation for its precision engineering and superior sound quality. Their products are used by audiophiles and professional DJs worldwide.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 27 2026

7 Patents

#3 in Valby

#366 in Denmark

Valby, Denmark