John Arne Ingemund Ekstrand

John Arne Ingemund Ekstrand is recorded as inventor on 1 U.S. patent in the PatentGenius reference database, with patent activity dated 1976.

Recorded Patents

• US3942901 — Optical sighting instrument with means for producing a sighting mark (Granted: 1976-03-09)

Related Patents in the Same Classification

• US7417664 — Stereoscopic image picking up and display system based upon optical axes cross-point information (Granted: 2008-08-26)
• US4822150 — Optical device for rotating the polarization of a light beam (Granted: 1989-04-18)
• US7976204 — Illumination system and method for recycling light to increase the brightness of the light source (Granted: 2011-07-12)

External Reference

Filing records and full claims text are accessible via the U.S. Patent and Trademark Office: View patents by John Arne Ingemund Ekstrand on Google Patents.