US 12,136,957 B2
Mobile device underwater communications system and method
Mark Rhodes, Edinburgh (GB); Derek Wolfe, Linlithgow (GB); and Brendan Peter Hyland, Edinburgh (GB)
Assigned to CSignum Ltd., Bathgate (GB)
Filed by CSignum Ltd., Bathgate (GB)
Filed on Apr. 7, 2023, as Appl. No. 18/297,317.
Application 18/297,317 is a continuation of application No. 17/373,664, filed on Jul. 12, 2021, granted, now 11,750,300.
Application 17/373,664 is a continuation in part of application No. 16/929,856, filed on Jul. 15, 2020, granted, now 11,063,674.
Application 16/929,856 is a continuation of application No. 16/391,094, filed on Apr. 22, 2019, granted, now 10,742,331.
Application 16/391,094 is a continuation of application No. 13/847,231, filed on Mar. 19, 2013, granted, now 10,270,540.
Application 13/847,231 is a continuation of application No. 13/211,066, filed on Aug. 16, 2011, granted, now 8,515,344.
Application 13/211,066 is a continuation of application No. 12/699,107, filed on Feb. 3, 2010, granted, now 8,045,919.
Application 12/699,107 is a continuation of application No. 11/454,630, filed on Jun. 15, 2006, granted, now 7,711,322.
Claims priority of provisional application 60/690,964, filed on Jun. 15, 2005.
Claims priority of provisional application 60/690,966, filed on Jun. 15, 2005.
Claims priority of provisional application 60/690,959, filed on Jun. 15, 2005.
Claims priority of application No. 0602398 (GB), filed on Feb. 7, 2006.
Prior Publication US 2023/0353256 A1, Nov. 2, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04B 13/02 (2006.01)
CPC H04B 13/02 (2013.01) [Y10S 367/901 (2013.01); Y10S 367/904 (2013.01); Y10S 367/91 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A communications system comprising:
a transmitter having an antenna operable to transmit a data carrying electromagnetic and/or magnetic signal to a remote receiver, and
the remote receiver comprising an antenna for receiving said data carrying electromagnetic and/or magnetic signal;
a processor;
a data interface; and
a control means,
wherein the data interface is operable to transfer data from the data carrying electromagnetic and/or magnetic signal received by the remote receiver to the control means and at least one of the transmitter and the remote receiver is underwater and the other of the transmitter and the remote receiver is above water, and
wherein a near field of said data carrying electromagnetic and/or magnetic signal corresponds to a region around said transmitter wherein at least one of inverse distance squared (1/r2) and inverse distance cubed (1/r3) field components of said data carrying electromagnetic and/or magnetic signal is greater than an inverse distance (1/r) field component thereof.