Patents

Our innovations and intellectual property

The growth of public and private LTE and 5G wireless networks, coupled with using new and more spectrum, demands new techniques to transmit and receive radio signals. Improving the performance of wireless infrastructure and user devices to increase signal propagation, avoid and reduce many types of interference and PIM, defend against jammers, increase the reliability of the radio link, and improve MIMO communications are all benefits possible with the use of software with current ISCO digital signal processing (DSP) algorithms.

Our innovations are protected by patents worldwide, and we’re proud to be recognized as an innovator in the wireless industry. Crain’s Chicago Business publishes an annual list of Chicago’s Most Innovative Companies based on the number and quality of patents granted, and ISCO has been included in this list for many years.

ISCO patents fall into several categories and are listed in the table below.

Interference

This portfolio includes patents related to the detection, mitigation, and elimination of RF interference in a communications system. ISCO products using these patents have been used by mobile network operators to improve performance, coverage, and capacity of their mobile Radio Access Networks.

PIM (Passive InterModulation) and SINR Optimization

This portfolio includes patents related to RF interference created by PIM and specific techniques that condition and optimize the RF link (i.e., improve the signal-to-noise ratio). Associated ISCO products have been field-proven by mobile network operators to eliminate PIM without requiring knowledge of the source and to improve capacity by optimizing SINR using a closed-loop system.

General

ISCO's patent portfolio also covers ideas and potential products that capitalize on polarization properties of RF to increase signal propagation, better isolate MIMO communication streams, and improve link budget and overall signal quality. The specific electromagnetic properties of the propagating RF signal can be leveraged in many different wireless applications to improve the performance of the network and result in higher peak speeds for data, greater channel capacity, and better wireless link quality and reliability.

This technology can be realized in passive hardware, software, or embedded in Open RAN RUs, CUDU, semiconductors, and other elements of wireless networks. It can be applied to antenna and MIMO antenna arrays, handsets, baseband units, radios, and practically any device or component that facilitates the transmission and reception of radio frequencies.

The aforementioned descriptions of the ISCO patents are illustrative and not an
interpretation of the claimed subject matter of any patents in the ISCO patent portfolio.

This section provides notice under 35 U.S.C. § 287(a) for ISCO products and associated patents listed below.
Additional patents may be pending.

ISCO Patent Portfolio

as of 10/1/2025

209

patents awarded

42

patents pending

ISCO 4G/5G Products

Patents Awarded

c-ONE PIM Manager

US10,652,835             US10,952,155             US11,277,803                US10,812,121
US11,362,693              US10,284,313             US10,594,416               US10,833,783
US11,184,094               US11,728,912              US12,166,517                US12,219,522
DE60 2019 060 591.9  EP3,830,984              other patents are pending

Link Conditioning®

US9,794,888               US10,244,483            US10,506,526               US10,820,282
US9,668,223               US9,912,433              US10,097,301                US10,512,044
US10,834,683              US11,330,531              US9,775,116                  US10,039,061
US10,231,190               US10,575,260             US10,959,185                US10,178,628
US10,687,284              US11,197,247               DE60 2016 028 687.4    EP3,292,642
US10,609,651              US10,834,684             US11,412,457                 US9,986,512
US10,425,903              US11,570,719               US11,877,247                US12,225,475                  other patents are pending

PurePass® and Dynamic Spectrum Recovery

US8,989,235               US9,214,983                 US10,187,190               US10,798,718
US11,166,288                US9,319,916                 US9,832,000              US10,327,255
US10,904,890              DE60 2014 046 853.5   EP2,974,439               US9,313,680
US9,634,819                US10,420,114                 US7,525,942              US11,950,270               US11,653,374                US12,219,588                other patents are pending

Proteus®CPRI

US10,523,252              US10,979,093                US10,491,252              US10,979,092                        US11,601,149                US11,855,670                 US12,149,272              other patents are pending


Patent Licensing

Interested in licensing our patents? While our innovations were developed for 5G-related products, some have applicability well beyond 5G. Let's talk.