Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Optical examination apparatus particularly useful as a Fizeau interferometer and schlieren device

Optical examination apparatus particularly useful as a Fizeau interferometer and schlieren device

US Patent 4854708 · Granted Aug 8, 1989

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Method and apparatus for registering unanswered telephone calls2004
Passive road sensor for automatic monitoring and method thereof2000
Passive road sensor for automatic monitoring and method thereof2000
Process for transmitting and/or storing information1998
File encryption method1998
Method and apparatus for measuring optical properties of optical devices1994
Graphic matter and process and apparatus for producing, transmitting and reading1994
Method and apparatus for broadcasting and receiving broadcasted information1994
Message receiving apparatus1993
Method and apparatus for optical examination of an object particularly by moire 1989
Method and apparatus of encryption of optical images1988
Method and apparatus for optically measuring distance between two surfaces1988