Intellectual property and technical record.

The 125+ worldwide issued-patent total is self-reported, not an independently reconciled count. “Worldwide issued patents” refers to granted national or regional patents across jurisdictions, not pending applications or a count of invention families. Multiple grants from one family may contribute separately. Inventor-name search totals can mix applications, grants, related families, and identity matches; they neither confirm nor disprove this total.

The technical work spans microfabrication, RF and millimeter-wave structures, materials, and advanced manufacturing. The patent record is distinct from ownership, current legal status, licensing rights, or customer adoption.

RF and millimeter-wave structures. 3D-microfabricated transmission lines, waveguides, packaging, antennas, filters, and millimeter-wave components for defense and aerospace systems. The PolyStrata platform developed at Nuvotronics anchors much of this cluster.

MEMS and microfabrication. Lithography-based microfabrication processes, sealed microstructures, additive microscale processes, and precision metal microstructure manufacturing. The processes underlying much of the RF work also generated independent inventions.

Materials and composites. Defense-relevant materials, composite tooling, controlled material systems, additive composite manufacturing, and process chemistry. This domain remains active through MacroVation's current operating work.

Advanced manufacturing processes. Process scale-up methods, manufacturability-driven design, trusted-source component approaches, and the engineering discipline that converts a microfabricated prototype into a manufacturable product.

Defense electronics and systems integration. Counter-UAS payloads, RF sensing structures, electronic warfare components, and the systems context that determines whether a component contributes to a fieldable capability.

Inventions arise within engineering teams and operating companies. The record should be read alongside the Haleos and Nuvotronics company histories, technical publications, and authorized operating evidence—not as a stand-alone score.

Selected families and supporting technical material can be discussed through appropriate diligence. Inventorship does not by itself establish current ownership, freedom to operate, manufacturing readiness, or product performance.

The relevance of the patent record is not simply invention volume. It demonstrates repeated exposure to the questions that matter in technical investment:

• Is the invention actually differentiated?
• Can ownership be established and defended?
• Does the IP map to a customer problem?
• Can it be manufactured?
• Does the portfolio create strategic leverage?
• Is the technology sufficiently mature to justify additional capital?
• Will the invention become a product, a licensing asset, a company platform, or an acquisition target?

Use Google Patents for convenient discovery and the USPTO for U.S. patent and application records. Check inventor identity, jurisdiction, publication type, grant status, and family relationships separately.

• Google Patents inventor discovery
• Google Patents — David Sherrer name variant
• USPTO Patent Public Search · Basic
• USPTO patent search hub
• USPTO Patent Center

In USPTO Basic Search, search inventor name “Sherrer, David.” Check variants including “David W. Sherrer” and “David Sherrer.” Neither an inventor search nor a U.S.-only database establishes a worldwide issued-patent total.