Unlike most occupational pocketknives, the Doctor's Knife was built around the preparation of medicine rather than heavy cutting. Most used a long, narrow frame with a spear blade and, frequently, a second spatula blade. The spear provided an ordinary cutting edge and could be used to divide pills, while the spatula gave physicians and pharmacists a small flat tool for handling powders, mixing medicines and salves, or moving pills. Another distinctive feature was the squared, flat bolster at the end of the handle. Often called a pill crusher or pill buster, it provided a hard, flat surface that could be used to crush tablets into powder. Not every Doctor's Knife carried the same combination of tools, however, with examples ranging from single-blade knives to versions pairing the spear with a pen blade instead of a spatula.

Those features make considerably more sense in an era when preparing medication could be part of the doctor's work. Country physicians regularly traveled to their patients rather than treating everyone in a dedicated office, and the medicines they carried could require cutting, crushing, mixing, or measuring before being administered. Pharmacists performed many of the same tasks behind the counter, where powders, pills, and compounded preparations were handled individually rather than supplied exclusively in the standardized forms familiar today. A slim folding knife that combined a cutting blade, small spatula, and crushing surface gave either profession several useful tools without taking up much room in a medical bag or pocket.

The Doctor's Knife remained in production even as the work that inspired it began to disappear. Case, for example, continued producing its full-size pattern into the 1970s, before it was discontinued and later returned it to production, long after house calls and hand-prepared medicines had ceased to occupy the place they once held in everyday medical practice.

The same blade geometry that worked so well on plants also proved useful far beyond the orchard. As a Hawkbill is drawn through a cut, its inward curve naturally pulls flexible material deeper into the edge rather than allowing it to slide away. That characteristic made the pattern particularly effective on rope, cable covering, insulation, carpet, roofing material, and other difficult materials encountered by tradesmen. Electricians and linemen adopted versions of the pattern for stripping and cutting cable, while roofers, flooring installers, utility workers, and others found the same hooked profile useful for controlled pulling cuts. Schrade, among other manufacturers, produced closely related patterns specifically marketed for linemen.

The Hawkbill therefore became unusual among occupational pocketknives because it crossed several very different trades without substantially changing its basic form. An orchard worker could use the curved blade to trim a branch or remove unwanted growth, while a lineman could use it to cut insulation or work through cable covering.

The pattern continued to develop in numerous forms, often sold as sailor's knives, rigging knives, marlinspike knives, yachtsman's knives, or boatswain's knives. Many eventually paired the spike with a broad sheepsfoot blade, whose long cutting edge worked particularly well on rope while its blunt tip eliminated the acute point found on a spear or clip point. Other versions incorporated tools such as shackle keys, screwdrivers, or can openers depending on the intended user.

For the men who spent their working lives around ships and rigging, a knife was as much a part of the job as the rope itself. Sailors carried them aloft into the rigging, sailmakers kept them close while cutting and repairing canvas, and dockworkers and shipyard crews relied on them whenever cordage needed attention. The addition of the marlinspike simply made an already essential tool better suited to that environment, giving maritime workers a compact implement built around the repetitive, hands-on demands of life aboard ship and along the waterfront.

The classic Stockman eventually settled into the familiar combination of clip point, sheepsfoot, and spey blades. The clip served as the primary general-purpose cutter, while the straight-edged sheepsfoot provided greater control for jobs that did not require a sharp point. The spey blade had much more specialized roots. Its rounded profile was developed for livestock work, including castration, where an aggressive point could cause unintended injury. Some earlier cattle and stock knives substituted a leather punch or other secondary blade, giving farmers another useful tool for maintaining harness, tack, and equipment.

That assortment made the Stockman particularly well suited to ranchers, cattlemen, farmers, and others whose work could change several times over the course of a day. Rather than asking a single edge to handle every task, the pattern offered several purpose-driven blades in a compact knife that could be carried easily in a pocket.

The two blades are normally a long clip point and a spey. The clip point supplied a fine tip for opening cuts and offered enough length for general camp and field work. The spey blade brought a broad belly and relatively blunt point that made it particularly useful when separating hide from an animal without constantly threatening to puncture the pelt. That same characteristic explains why the spey blade also appears on livestock-oriented patterns such as the Stockman. Despite the name, the Trapper should not be treated as a knife carried exclusively by professional fur trappers. The pattern also found a place among farmers, hunters, and other rural users. Its design nevertheless made excellent sense on a trapline.