A product-centered intellectual property moat
QLT's patent portfolio is organized from the chip core outward — protecting the proprietary coherence-restoration waveguide geometry, switching layer, materials integration, and quantum applications that define the flagship processor.
Proprietary optical distortion reversal for quantum computing is unpatented globally
Exhaustive prior art searches confirm no existing patents combine QLT's proprietary coherence-restoration method with quantum error correction for photonic qubits. QLT occupies this white space with 34+ filings and 448+ claims organized across four tiers.
Four-tier IP structure
Patents organized from the core product outward — each tier builds on and defends the ones beneath it.
5 patents · ~120 claims
The hardware moat: processor architecture, proprietary coherence-restoration waveguide geometry, all-optical switch, stress-relief cladding, ultra-low-loss circuit design. These protect the chip itself.
3 patents · ~60 claims
Application-layer patents extending the core chip into commercial verticals: continuous-variable quantum processing, photonic AI acceleration, and hybrid quantum-classical cryptanalysis.
5 patents · 148 claims
Strategic patents that block alternative implementations: coherence lattice method, multiplexed source integration, hybrid waveguide design, qubit encoding conversion, and system-level calibration protocols.
21+ additional filings
Advanced quantum memories, proprietary quantum error correction, interconnects, qRAM, timing synchronization, and 14 defensive provisionals covering data-center, acoustic-photonic, satellite, and simulation IP.
Why the portfolio is organized this way
Every patent exists to defend a specific aspect of the flagship processor. There are no orphan filings, no patents without a product anchor, and no speculative claims that could undermine credibility.
- Core patents defend what sits on the chip
- Extension patents protect commercial applications
- Gap filings close routes around the core moat
- Defensive provisionals preserve future optionality
- Partner IP boundaries formally defined
All-optical transistor technology
QLT's proprietary femtosecond all-optical switch is foundational to the control layer. Protected by exclusive licensing agreements and proprietary integration protocols for quantum applications.
- Sub-175 fs switching — 5,700× faster than CMOS
- Exclusive quantum application rights
- Protected integration protocols
- Next-generation switch designs in development
Request detailed patent documentation
Public materials describe the portfolio structure. Family-level claim charts, prosecution strategy, and implementation-sensitive detail are available through a controlled diligence path.