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patented stamp on papers

detailed view of a old nautical sextant with optics isolated on white background

linen tester with Swiss 2 1/2 Rappen Orts-Post stamp from 1850

A coin operated viewfinder in Queens overlooks the East River with Manhattan on the other side

A transit is used by engineers in surveying to measure the horizontal and vertical angles and distances.

Old telescope

Vintage engine room telegraph isolated on white background

Wooden stamp and red imprint PATENT LAW with judge's hammer on white surface. 3D illustration

Antique wind-up clock with three dials in vintage style.

Old brass telescope on white background.

PATENTED CONCEPT

Electronic Instrument on White Background

Antique scale in a room

3D Rendering Illustration of a Microscope designed and use by Robert Hooke in the middle of XVII century; with wooden bases and parts, mobile metal components, removable lenses, crystals & oil lamp.

Optometrist vision chart on wall for checking eyesight of patient at clinic

Ship telegraph time machine going to Present time

Machine used for eye measurement

old equipment and science experiments in laboratory.

Close up of optometry equipment

Business cards indexed and organized alphabetically for communications and contacts or leads for sales to clients

Optical tool with mirrors and magnifying glasses

A Retro Coin Operated Tower Viewer (Telescope, Binoculars Or Scenic Viewer), Isolated On A White Background

Antique telescope on a tripod at a beach facing window.

A closeup of indicator dials from the famous 'Bombe' machine at Bletchley Park used for deciphering German encrypted 'Enigma' messages

Coin operated binoculars with clipping path on white background

old navigation equipment

Old brass telescope on white background.

PATENTED CONCEPT

Mechanical processing fixture

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