|
US Pat. No. |
Company / Author |
Subject |
|
6778764 |
Light & Motion |
Strobe controller system with flash unit interoperability. |
|
6704500 |
Inon |
IR filtered slave triggering [Clear-Photo system]. |
|
6518714 |
Inon |
Dual-tubes in perpendicular orientation [D-180, Z-220] |
|
6512887 |
Inon |
Target light control [Z-220] |
|
6154610 |
Inon |
Housing & control unit for UW camera |
|
6061522 |
Inon |
Optical cable and slave flash. |
6029013
5794273 |
Light & Motion |
TTL sync multiplexed over single optical channel. |
|
4652108 |
Nikon |
Inverter voltage regulation |
|
US Pat. No. |
Company / Author |
Subject |
5940231
5719715 |
Westhaver |
UW colour correction |
|
5591540 |
Nikon |
UW camera lens |
|
5142299 |
Braun |
Distance finder using crossed light beams [Spot-Shot] |
|
5002372 |
Canon |
UW focus-free lens |
|
4856880 |
Nikon |
UW camera lens |
|
4724448 |
Minolta |
Concave front lens element reduces focusing distance UW |
|
4697897 |
Canon |
Tilted window for correction of UW parallax error of optical
viewfinder or strobe aiming. |
|
4634253 |
Canon |
Restriction of lens focusing range for UW photography |
|
4542959 |
Kreutzig |
UW colour correction |
|
4470680 |
Minolta |
Automatic switching to fixed focus underwater |
|
4381144 |
Breslau |
Housing with UW sonar rangefinder |
RE30804
3976364 |
Lindemann & Goodell |
Optical air lens system |
|
4295721 |
Rebikoff |
High pressure optical enclosure |
|
4168897 |
Gates |
UW camera extension tube [Nikonos] |
|
3001462 |
De Wouters |
Liquid-tight objective for UW camera [Calypso] |
US patents are
available in full, free of charge, from: 
This page is not
meant to be a comprehensive list of UW photography patents. These
references are provided because they provide general interest
or background material relating to products and devices with
which many underwater photographers will be familiar.
