Patent · US Expired

Device for lenses of various lengths

US5831778A · kind A · utility

30Cited by
7References
4Claims
0Family size

Assignee

Inventor

Key dates

Filing dateJun 18, 1997
Grant dateNov 3, 1998
Priority date
Expiry dateJun 18, 2017

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG02B7/04
  • WIPO fieldOptics
  • WIPO sectorInstruments

Abstract

A device for lenses of different lengths enables a user to replace different lenses of different lengths by only removing parts of the device without replacing a whole set of the device.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.